{"product_id":"nist-silicon-metal-standard-refence-material-srm-40-g-57b","title":"NIST Silicon Metal Standard Refence Material (SRM), 40 g, 57B","description":"\u003cp\u003e\u003cstrong\u003eNIST® Silicon Metal Standard Refence Material (SRM), 40 g, 57B\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAppearance:  gray to black powder\u003c\/li\u003e\n\u003cli\u003eCAS Nos.: \n\u003cul\u003e\n\u003cli\u003eSilicon Powder:  7440-21-3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eMolecular Formula:  Si\u003c\/li\u003e\n\u003cli\u003eMolecular Weight:  28.09 g\/mol\u003c\/li\u003e\n\u003cli\u003eMelting\/Freezing Point:  1410 ºC (2570 ºF)\u003c\/li\u003e\n\u003cli\u003eBoiling Point Range:  2355 (4271 ºF)\u003c\/li\u003e\n\u003cli\u003eDensity:  2.33 g\/mL at 25 ºC\u003c\/li\u003e\n\u003cli\u003eVapor Pressure:  1 mm Hg at 1724 ºC\u003c\/li\u003e\n\u003cli\u003eSolubilities:\n\u003cul\u003e\n\u003cli\u003eNitric acid\/hydrofluoric acid mixtures\u003c\/li\u003e\n\u003cli\u003eMolten alkali oxides\u003c\/li\u003e\n\u003cli\u003eMolten metals\u003c\/li\u003e\n\u003cli\u003eGermanium\u003c\/li\u003e\n\u003cli\u003eInsoluble in organic solvents and water\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eAuto-Ignition Temperature:  780 (1436 ºF)\u003c\/li\u003e\n\u003cli\u003eExplosive Limits, LEL (Volume %):  160 g\/m\u003csup\u003e3\u003c\/sup\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Others","offers":[{"title":"EA (1)","offer_id":51111600259387,"sku":"NBS-57B-EA","price":1860.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/NBS-57B_1ef1e98a-c8fb-458d-b54f-187c9e8783ad.png?v=1784720117","url":"https:\/\/preiser.com\/products\/nist-silicon-metal-standard-refence-material-srm-40-g-57b","provider":"Preiser Scientific","version":"1.0","type":"link"}