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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.
This is a list of CAS numbers by chemical formulas and chemical compounds, indexed by formula.The CAS number is a unique number applied to a specific chemical by the Chemical Abstracts Service (CAS).This list complements alternative listings to be found at list of inorganic compounds and glossary of chemical formulae
The CAS Chemical Registry System was introduced in 1965. CAS developed a unique registry number to identify chemical substances. Agencies such as the U.S. Environmental Protection Agency and local fire departments around the world now rely on these numbers for the definite identification of substances. According to the ACS, this is the largest ...
Chemical reactions from the patent literature Chemical reaction SMILES, annotated procedures, characterization data, reference metadata Curated from patent literature "SaguaroChem". 4 July 2024. 2,091,105 SciFinder: Chemical Abstracts Service of American Chemical Society: organic, inorganic chemicals, proteins CASNo paid access only 130,000,000
Each of these would be considered a different record in a chemical registry system. Registration systems also preprocess molecules to avoid considering trivial differences such as differences in halogen ions in chemicals. An example is the Chemical Abstracts Service (CAS) registration system. See also CAS registry number.
The Beilstein database is a database in the field of organic chemistry, in which compounds are uniquely identified by their Beilstein Registry Number.The database covers the scientific literature from 1771 to the present and contains experimentally validated information on millions of chemical reactions and substances from original scientific publications.
The identification of the chemicals on the Cards is based on the UN numbers, the Chemical Abstracts Service (CAS) number and the Registry of Toxic Effects of Chemical Substances (RTECS/NIOSH) numbers. It is thought that the use of those three systems assures the most unambiguous method of identifying the chemical substances concerned, referring ...
The Chemical Abstracts Service (CAS) registry number system was designed to be fault-tolerant. Built into every CAS number is a check-digit that makes it possible to detect mis-typed numbers. Validation is a mathematical and repetitive process well-suited for software.