Chemical Abstracts Service Cas Number

Cas is a division of the american chemical society that provides products and services that help empower scientific discoveries.

Chemical abstracts service cas number. The right most digit is a check digit used to verify the validity and uniqueness of the entire number. How does cas assign registry numbers. Welcome to common chemistry from chemical abstracts service cas a web resource that contains cas registry numbers for approximately 7900 chemicals of widespread general public interest. A cas registry number is a numeric identifier that can contain up to 10 digits divided by hyphens into three parts.

Stay abreast of rapidly changing chemical regulations with cas regulatory resources. Records may also have ca index names synonyms structure diagrams stereochemistry molecular formulas ring data alloy composition tables protein and nucleic acid sequences classes for polymers and the number of references in the cacaplus databases. Specialized substance collections count. Check out our latest product scifinder n to see how you can inlock your rd productivity.

68542531 sequences cas rn 2449267 11 0 is the most recent cas registry number cas also provides specialized databases of chemical reactions regulated chemicals commercially available chemicals and markush substance information. Covers more than 395000 unique chemical substances. Common chemistry is helpful to non chemists who know either a name or cas registry number of a common chemical and want to pair both pieces of information. The chemical information is produced by cas and is prepared by the cas registry system which identifies each compound with a specific cas registry number index name and graphic representation of its chemical structure.

It is part of the american chemical society and the numbers given to compounds are in the sequence of new substances identified. Abbreviated as chemical abstracts service number is given to every chemical compound that has been in existence from the early 1900 to till date by the chemical abstracts service registry. A cas registry number also referred to as casrn or cas number is a unique numerical identifier assigned by the chemical abstracts service cas to every chemical substance described in the open scientific literature currently including all substances described from 1957 through the present plus some substances from the early or mid 1900s including organic and inorganic compounds minerals isotopes alloys and nonstructurable materials uvcbs substances of u nknown or v ariable. An introduction cas no.

All substance records contain a unique cas registry number.