CAS Registry Number - Wikipedia
https://en.wikipedia.org/wiki/CAS_Registry_NumberA CAS Registry Number, also referred to as CAS RN or informally 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 it includes all substances described from 1957 through the present, plus some substances from as far back as the early 1800s. It includes organic and inorganic compounds, minerals, isotopes, alloys, mixtures, and nonstructurable materi…
CAS REGISTRY | CAS
www.cas.org › cas-data › cas-registryWhat is a CAS Registry Number®. Chemical compounds are described in many different ways including molecular formulas, chemical structures, generic, systematic, common, and trade names. This lack of clarity can cause frustration, delays, and even safety concerns. A CAS Registry Number is a unique and unambiguous identifier for a specific substance that allows clear communication and, with the help of CAS scientists, links together all available data and research about that substance.
CAS REGISTRY | CAS
https://www.cas.org/cas-data/cas-registryAuthoritative source for accurate chemical names, structures, and CAS Registry Numbers ®. 192 million organic and inorganic substances, including alloys, coordination compounds, minerals, mixtures, polymers, and salts disclosed in publications since the early 1800s. ~70 million protein and nucleic acid sequences.
CAS REGISTRY and CAS Registry Number FAQs | CAS
www.cas.org › support › documentationA CAS Registry Number is a numeric identifier that can contain up to 10 digits, divided by hyphens into three parts. The right-most digit is a check digit used to verify the validity and uniqueness of the entire number. For example, 58-08-2 is the CAS Registry Number for caffeine. How does CAS assign Registry Numbers? A CAS Registry Number is assigned to a substance when it enters the CAS REGISTRY database.
CAS Common Chemistry
https://commonchemistry.cas.orgCAS Common Chemistry is an open community resource for accessing chemical information. Nearly 500,000 chemical substances from CAS REGISTRY ® cover areas of community interest, including common and frequently regulated chemicals, and those relevant to high school and undergraduate chemistry classes. This chemical information, curated by our expert scientists, …