Cas number what is

CAS No. It is part of the American Chemical Society, and the numbers given to compounds are in the sequence of new substances identified. Numerical representation of a compound is through a max of 10 digits, with hyphens to separate it into three parts.

The right most digit is the one to verify validity and uniqueness of the number and is referred to as check digit. CAS number is unique to a compound and does not have any significance to its chemical formula or to the compound.

The important aspect of following CAS number is to rule out confusion in identifying compounds and have access to a trove of information.

It is the most reliable platform that is used across the globe and serves as a common link between various nomenclature terms that describe substances. By clicking sign up, you agree to receive emails from Safeopedia and agree to our Terms of Use and Privacy Policy.

Each number assigned by the CAS is unique to one chemical substance. There is no correlation to that scientific chemical number for the substance. CAS numbers are utilized in a range of databases to make it faster to retrieve the pertinent information about that particular chemical. Chemical Abstracts Services CAS numbers can be up to 10 digits long and three hyphenated parts to them.

The last digits are check numbers to confirm the uniqueness of the CAS number. Assignment of CAS numbers is done in sequential order as the number is entered into the database. Compounds that may be entered into the database includes such things as metals, alloys, isotopes, minerals, and inorganic compounds. Subscribe to the Safeopedia newsletter to stay on top of current industry trends and up-to-date know-how from subject matter authorities. Our comprehensive online resources are dedicated to safety professionals and decision makers like you.

By: Daniel Clark. Perform Search Perform Search. No results for your query. Feel free to inquire about a familiarization training session. Since CAS Registry Numbers are not dependent upon any system of chemical nomenclature, they can: Provide a reliable common link between the various nomenclature terms used to describe substances Serve as an international resource for chemical substance identifiers used by scientists, industry, and regulatory bodies Why do regulatory agencies rely on CAS Registry Numbers?

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