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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.
CAS registry numbers are unique numerical identifiers for chemical elements, compounds, polymers, biological sequences, mixtures and alloys. They are also referred to as CAS numbers , CAS RNs or CAS #s .
Chemical formula Synonyms CAS number C 10 H 16 N 2 O 8: Ethylenediaminetetraacetic acid (EDTA): 6381–92–6 C 12 H 22 O 11: sucrose: 57–50–1 C 18 H 29 O 3 S: sodium dodecyl benzenesulfonate: 2155–30–0
Number 1A on the 1040 form details your total amount from W-2 income, which will be box 1 on your W-2. Number 25 on the 1040 form details the federal income tax withheld on your W-2 forms.
The International Chemical Identifier (InChI, pronounced / ˈ ɪ n tʃ iː / IN-chee) [3] is a textual identifier for chemical substances, designed to provide a standard way to encode molecular information and to facilitate the search for such information in databases and on the web.
Form W-2, 2016. Form W-2 (officially, the "Wage and Tax Statement") is an Internal Revenue Service (IRS) tax form used in the United States to report wages paid to employees and the taxes withheld from them. [1] Employers must complete a Form W-2 for each employee to whom they pay a salary, wage, or other compensation as part of the employment ...
The case of articles that have no CAS number yet, and especially those with no infobox, is more complicated. I would prefer handling those as a separate project, as it is much more time-consuming. In those cases I searched for the compound by name, or sometimes by structure or formula, and added the new CAS number to the infobox if there was one.
Different CAS Registry Numbers [1] are used for each form of a substance. For example, something simple like alanine will have one CAS# for the D form, another for L, another for "unspecified" and a fourth one for racemic. There would be another four CAS#s for the hydrochloride, four for the (1:1) sulfate, four for the (2:1)sulfate, etc.