{"title":"Grades 42\/44-Whatman","description":"\u003cp\u003eGrades 42\/44-Whatman\u003c\/p\u003e","products":[{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-4-25-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 4.25 cm","description":"\u003cp\u003eGrade 42 Ashless Filter Paper for Instrumental Analysis, 42.5 mm circle\u003c\/p\u003e\n\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers from Cytiva business are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Cytiva's Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e \u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953156923,"sku":"90-7503-01-PK","price":39.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-01_69b8385c-5183-47dd-b7d2-1ffcd0cac784.png?v=1784705367"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-5-5-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 5.5 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953222459,"sku":"90-7503-02-PK","price":45.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-02_18153061-62a7-4c59-9243-6d8ae4b9df51.png?v=1784705369"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-7-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 7 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953255227,"sku":"90-7503-03-PK","price":54.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-03_7e1fb1cd-e2b4-4fb4-8a0c-e03132fdd988.png?v=1784705370"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-9-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 9 cm","description":"\u003cp\u003e\u003cstrong\u003eCytiva® Whatman® Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 9 cm, 1442-090\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-purity, ashless Grade 42 quantitative filter papers are suitable for wide range of critical analytical filtration procedures for quantitative analysis\u003c\/li\u003e\n\u003cli\u003eOffer finest retention of all Whatman ashless filter paper grades—retention of extremely small particles\u003c\/li\u003e\n\u003cli\u003eDesigned for gravimetric analysis and sample preparation for instrumental analysis\u003c\/li\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCommon example of use of Grade 42 is as calcium carbonate filter for analysis in cement industry\u003c\/li\u003e\n\u003cli\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments\u003c\/li\u003e\n\u003cli\u003eHigh purity of Grade 42 filters also makes them suitable for processes that require ashing\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953287995,"sku":"90-7503-04-PK","price":73.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-04_56570824-0fec-42bf-8ba1-2600a7760f9d.png?v=1784705372"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-11-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 11 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953320763,"sku":"90-7503-05-PK","price":90.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-05_2dc81977-6f89-45ff-995d-b38f98581e62.png?v=1784705373"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-12-5-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 12.5 cm, Cytiva, 1442-125","description":"\u003cp\u003e\u003cstrong\u003eCytiva® Whatman® Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 12.5 cm, 1442-125\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh-purity ashless Grade 42 quantitative filter papers are suitable for wide range of critical analytical filtration procedures for quantitative analysis\u003c\/li\u003e\n\u003cli\u003eHave finest retention of all Whatman ashless filter paper grades\u003c\/li\u003e\n\u003cli\u003eDesigned for gravimetric analysis and sample preparation for instrumental analysis\u003c\/li\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as calcium carbonate filter in cement industry\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis of precipitates including barium sulfate and metastannic acid for use in glazes, coatings, and pigments\u003c\/li\u003e\n\u003cli\u003eSuitable of processes that require ashing\u003c\/li\u003e\n\u003cli\u003eNominal thickness: 200 µm\u003c\/li\u003e\n\u003cli\u003eNominal basis weight: 100 g\/m\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/li\u003e\n\u003cli\u003eMinimum alpha cellulose content: ≥98%\u003c\/li\u003e\n\u003cli\u003eTrace element levels: Aluminium 2.5 µg\/g Antimony \u0026lt;0.5 µg\/g Arsenic \u0026lt;0.5 µg\/g Barium \u0026lt;0.5 µg\/g Boron \u0026lt;1 µg\/g Calcium 8.3 µg\/g Chromium 1.5 µg\/g Copper 2 µg\/g Iron 12 µg\/g Lead \u0026lt;0.5 µg\/g Magnesium 4 µg\/g Manganese \u0026lt;0.5 µg\/g Mercury \u0026lt;0.5 µg\/g Potassium 2.3 µg\/g Silicon 6.2 µg\/g Sodium 16.8 µg\/g Zinc 64.5 µg\/g \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953386299,"sku":"90-7503-06-PK","price":103.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-06.png?v=1784923568"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-15-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 15 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953451835,"sku":"90-7503-07-PK","price":130.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-07.png?v=1784705376"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-18-5-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 18.5 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953484603,"sku":"90-7503-08-PK","price":191.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-08_695928e7-4499-48b4-a664-b99881a26082.png?v=1785292424"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-24-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 24 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953517371,"sku":"90-7503-09-PK","price":306.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-09_b0fd193e-6699-43b2-9430-0235c3b55f3d.png?v=1784705379"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-32-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 32 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953550139,"sku":"90-7503-11-PK","price":630.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-11.png?v=1784705381"},{"product_id":"cotton-ashless-2-5-µm-quantitative-cellulose-grade-cfp42-11cm","title":"Cotton\/Ashless 2.5 µm Quantitative Cellulose Grade CFP42, 11cm","description":"\u003cp\u003e\u003cstrong\u003eI.W. Tremont Cotton\/Ashless 2.5 µm Quantitative Cellulose Grade CFP42, 11cm, CFP42-110\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis media demonstrates an extremely high retention rate for a cellulose filter media\u003c\/li\u003e\n\u003cli\u003eIts uniquely high retention rate makes it ideal for any gravimetric analysis of very fine precipitates\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"border-style: solid; margin-left: auto; margin-right: auto;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Media\u003c\/td\u003e\n\u003ctd\u003eCFP42 Quantitative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFurnish\/Finish\u003c\/td\u003e\n\u003ctd\u003eCotton\/Ashless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRetention\u003c\/td\u003e\n\u003ctd\u003e2.5 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow Rate\u003c\/td\u003e\n\u003ctd\u003eSlow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsh Content\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.01%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBasis Weight\u003c\/td\u003e\n\u003ctd\u003e140 g\/m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.170\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"I W Tremont","offers":[{"title":"PK (1)","offer_id":51110953681211,"sku":"90-7503-25-PK","price":27.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-25_7930e8b3-1478-44e1-b628-77fda629b7e1.png?v=1784923569"},{"product_id":"whatman-grade-42-quantitative-ashless-filter-paper-very-fine-precipitates-retained-4-7-cm","title":"Whatman Grade 42 Quantitative Ashless Filter Paper, Very Fine Precipitates Retained, 4.7 cm","description":"\u003cp id=\"overview\" class=\"lead-paragraph\"\u003eOur high-purity Cytiva Whatman ashless Grade 42 quantitative filter papers are suitable for a wide range of critical analytical filtration procedures for quantitative analysis. Grade 42 filter papers have the finest retention of all Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis.\u003c\/p\u003e\n\u003cp class=\"lead-paragraph\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAshless: 0.007% ash maximum\u003c\/li\u003e\n\u003cli\u003eFine (2.5 μm) nominal particle retention rating, eliminates large particles that might otherwise interfere with sensitive instrumentation\u003c\/li\u003e\n\u003cli\u003eHerzberg filtration speed of 1870 s\u003c\/li\u003e\n\u003cli\u003eCommonly used as a calcium carbonate filter\u003c\/li\u003e\n\u003cli\u003eParticularly suitable for gravimetric analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"rte-wrapper\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhatman Grade 42 quantitative papers are designed for retention of extremely small particles. A common example is use of Grade 42 as a calcium carbonate filter for analysis in the cement industry.\u003c\/p\u003e\n\u003cdiv class=\"read-more-expandable\"\u003e\n\u003cp\u003eOther typical precipitates for gravimetric analysis include barium sulfate and metastannic acid for use in glazes, coatings, and pigments. The high purity of Grade 42 filters also makes them suitable for processes that require ashing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953713979,"sku":"90-7503-91-PK","price":50.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7503-91.png?v=1784705385"},{"product_id":"whatman-grade-44-quantitative-ashless-filter-paper-fine-precipitates-retained-7-cm","title":"Whatman Grade 44 Quantitative Ashless Filter Paper, Fine Precipitates Retained, 7 cm","description":"\u003cp\u003eCytiva Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAshless\u003c\/strong\u003e: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened low ash\u003c\/strong\u003e: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened ashless:\u003c\/strong\u003e 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 44: 3 μm (slow to medium filter paper)\u003c\/strong\u003e\u003cbr\u003eThin version of Grade 42 retaining very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003ematerial  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecircles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecotton filters (high-quality cotton linters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003epackaging  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003epack of 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003eparameter  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e0.29 psi wet burst\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e995 sec\/100 mL speed (Herzberg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ediam.  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ethickness  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e180 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003eash  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e≤0.007%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003epore size  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e3 μm (Particle retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ebasis weight  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e80 g\/m\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953746747,"sku":"90-7505-03-PK","price":52.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7505-03.png?v=1784705387"},{"product_id":"whatman-grade-44-quantitative-ashless-filter-paper-fine-precipitates-retained-9-cm","title":"Whatman Grade 44 Quantitative Ashless Filter Paper, Fine Precipitates Retained, 9 cm","description":"\u003cp\u003eCytiva Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAshless\u003c\/strong\u003e: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened low ash\u003c\/strong\u003e: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened ashless:\u003c\/strong\u003e 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 44: 3 μm (slow to medium filter paper)\u003c\/strong\u003e\u003cbr\u003eThin version of Grade 42 retaining very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003ematerial  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecircles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecotton filters (high-quality cotton linters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003epackaging  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003epack of 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003eparameter  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e0.29 psi wet burst\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e995 sec\/100 mL speed (Herzberg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ediam.  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ethickness  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e180 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003eash  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e≤0.007%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003epore size  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e3 μm (Particle retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ebasis weight  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e80 g\/m\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953779515,"sku":"90-7505-04-PK","price":73.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7505-04_1a0084e8-0ebf-42b9-ae0c-1320f01efacc.png?v=1784705388"},{"product_id":"whatman-grade-44-quantitative-ashless-filter-paper-fine-precipitates-retained-11-cm","title":"Whatman Grade 44 Quantitative Ashless Filter Paper, Fine Precipitates Retained, 11 cm","description":"\u003cp\u003eCytiva Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAshless\u003c\/strong\u003e: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened low ash\u003c\/strong\u003e: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened ashless:\u003c\/strong\u003e 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 44: 3 μm (slow to medium filter paper)\u003c\/strong\u003e\u003cbr\u003eThin version of Grade 42 retaining very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003ematerial  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecircles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecotton filters (high-quality cotton linters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003epackaging  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003epack of 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003eparameter  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e0.29 psi wet burst\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e995 sec\/100 mL speed (Herzberg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ediam.  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e110 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ethickness  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e180 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003eash  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e≤0.007%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003epore size  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e3 μm (Particle retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ebasis weight  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e80 g\/m\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953877819,"sku":"90-7505-05-PK","price":89.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7505-05.png?v=1784705390"},{"product_id":"whatman-grade-44-quantitative-ashless-filter-paper-fine-precipitates-retained-12-5-cm","title":"Whatman Grade 44 Quantitative Ashless Filter Paper, Fine Precipitates Retained, 12.5 cm","description":"\u003cp\u003eCytiva Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAshless\u003c\/strong\u003e: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened low ash\u003c\/strong\u003e: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened ashless:\u003c\/strong\u003e 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 44: 3 μm (slow to medium filter paper)\u003c\/strong\u003e\u003cbr\u003eThin version of Grade 42 retaining very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003ematerial  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecircles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecotton filters (high-quality cotton linters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003epackaging  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003epack of 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003eparameter  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e0.29 psi wet burst\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e995 sec\/100 mL speed (Herzberg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ediam.  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e125 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ethickness  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e180 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003eash  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e≤0.007%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003epore size  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e3 μm (Particle retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ebasis weight  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e80 g\/m\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953910587,"sku":"90-7505-06-PK","price":102.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7505-06.png?v=1784705391"},{"product_id":"whatman-grade-44-quantitative-ashless-filter-paper-fine-precipitates-retained-15-cm","title":"Whatman Grade 44 Quantitative Ashless Filter Paper, Fine Precipitates Retained, 15 cm","description":"\u003cp\u003eCytiva Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAshless\u003c\/strong\u003e: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened low ash\u003c\/strong\u003e: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened ashless:\u003c\/strong\u003e 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 44: 3 μm (slow to medium filter paper)\u003c\/strong\u003e\u003cbr\u003eThin version of Grade 42 retaining very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003ematerial  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecircles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecotton filters (high-quality cotton linters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003epackaging  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003epack of 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003eparameter  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e0.29 psi wet burst\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e995 sec\/100 mL speed (Herzberg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ediam.  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e150 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ethickness  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e180 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003eash  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e≤0.007%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003epore size  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e3 μm (Particle retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ebasis weight  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e80 g\/m\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953943355,"sku":"90-7505-07-PK","price":130.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7505-07.png?v=1784705392"},{"product_id":"whatman-grade-44-quantitative-ashless-filter-paper-fine-precipitates-retained-18-5-cm","title":"Whatman Grade 44 Quantitative Ashless Filter Paper, Fine Precipitates Retained, 18.5 cm","description":"\u003cp\u003eCytiva Whatman quantitative filters are designed for gravimetric analysis and the preparation of samples for instrumental analysis. They are available in three formats designed to meet your specific needs.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAshless\u003c\/strong\u003e: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened low ash\u003c\/strong\u003e: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardened ashless:\u003c\/strong\u003e 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 44: 3 μm (slow to medium filter paper)\u003c\/strong\u003e\u003cbr\u003eThin version of Grade 42 retaining very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003ematerial  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecircles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003ecotton filters (high-quality cotton linters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003epackaging  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003epack of 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003eparameter  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e0.29 psi wet burst\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"lft\"\u003e \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e995 sec\/100 mL speed (Herzberg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ediam.  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e185 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ethickness  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e180 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003eash  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e≤0.007%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003epore size  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e3 μm (Particle retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"display: table-row;\"\u003e\n\u003ctd class=\"lft\"\u003ebasis weight  \u003c\/td\u003e\n\u003ctd class=\"rgt\"\u003e80 g\/m\u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Cytiva","offers":[{"title":"PK (1)","offer_id":51110953976123,"sku":"90-7505-08-PK","price":191.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/90-7505-08_8cd27a36-0ff8-49f3-96d4-ae481b719a23.png?v=1784705394"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/collections\/imgi_3_802070802.jpg?v=1762207552","url":"https:\/\/preiser.com\/collections\/grades-42-44-whatman.oembed","provider":"Preiser Scientific","version":"1.0","type":"link"}