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Screenshot of the CAS Common Chemistry database with information about caffeine ().. A CAS Registry Number [1] (also referred to as CAS RN [2] or informally CAS Number) is a unique identification number, assigned by the Chemical Abstracts Service (CAS) in the US to every chemical substance described in the open scientific literature, in order to index the substance in the CAS Registry.
As 2 O 5: arsenic pentoxide: 1303–28–2 As 2 P 2: arsenic diphosphide: 12512–03–7 As 2 S 3: arsenic trisulfide: 1303–33–9 As 2 S 4: arsenic tetrasulfide: 1303–32–8 As 2 S 5: arsenic pentasulfide: 1303–34–0 As 2 Se: arsenic hemiselenide: 1303–35–1 As 2 Se 3: arsenic triselenide: 1303–36–2 As 2 Se 5: arsenic ...
Isobutane is the principal feedstock in alkylation units of refineries. Using isobutane, gasoline-grade "blendstocks" are generated with high branching for good combustion characteristics.
Chemical Abstracts Service Building B in August 2009. Columbus, Ohio. STN (Scientific & Technical Information Network) International is operated jointly [4] by CAS and FIZ Karlsruhe, and is intended primarily for information professionals, using a command language interface.
The state also set a PFOS standard at 13 ppt. [24] The state had set a standard for PFNA in September 2018, with an MCL of 13 ppt. [25] [26] In August 2020 the State of Michigan adopted drinking water standards for 5 previously unregulated PFAS compounds and lowered acceptable levels for 2 previously regulated compounds PFOS and PFOA to 16 ppt ...
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1,1-Dichloroethylene, commonly called vinylidene chloride or 1,1-DCE, is an organochloride with the molecular formula CCl 2 CH 2.It is a colorless liquid with a sharp odor. Like most chlorocarbons, it is poorly soluble in water but soluble in organic solvents. 1,1-DCE was the precursor to the original clingwrap, Saran, for food, but this application has been phased
Di-tert-butyl dicarbonate is a reagent widely used in organic synthesis. [1]Since this compound can be regarded formally as the acid anhydride derived from a tert-butoxycarbonyl (Boc) group, it is commonly referred to as Boc anhydride.