Screenshot of the CAS Common Chemistry database with information about caffeine (58-08-2).
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 registry includes all substances described since 1957, plus some substances from as far back as the early 1800s;[3] it is a chemical database that includes organic and inorganic compounds, minerals, isotopes, alloys, mixtures, and nonstructurable materials (UVCBs, substances of unknown or variable composition, complex reaction products, or biological origin).[4] CAS RNs are generally serial numbers (with a check digit), so they do not contain any information about the structures themselves the way SMILES and InChI strings do.
The CAS Registry is an authoritative collection of disclosed chemical substance information. It identifies more than 204 million unique organic and inorganic substances and 69 million protein and DNA sequences,[3] plus additional information about each substance. It is updated with around 15,000 additional new substances daily.[5] A collection of almost 500 thousand CAS registry numbers are made available under a CC BY-NC license at ACS Commons Chemistry.[6]
^CAS registry description Archived 2008-07-25 at the Wayback Machine, by Chemical Abstracts Service
^"CAS Registry Number Verified Partner Program". CAS. Retrieved 4 August 2021.
^ ab"CAS Content: Substances". www.cas.org. Retrieved 10 August 2020.
^American Chemical Society. "CAS Registry and CASRNs". Archived from the original on 25 July 2008. Retrieved 25 July 2009.
^Chemical Substances – CAS REGISTRY
^"CAS Common Chemistry expands collection of publicly available chemical information". CAS. Retrieved 17 March 2021.
and 21 Related for: CAS Registry Number information
A CASRegistryNumber (also referred to as CAS RN or informally CASNumber) is a unique identification number, assigned by the Chemical Abstracts Service...
point 72–74 °C, boiling point 180–181 °C, specific gravity 1.027. CASregistrynumber 107-93-7. Myristoleic acid has 14 carbons, is found in whale blubber...
The Beilstein RegistryNumber is a way of identifying compounds similar to the CASregistrynumber. It is the unique identifier for compounds in the Beilstein...
from CAS and GenBank, produced by the National Institutes of Health. The chemical information is produced by CAS, and is prepared by the CASRegistry System...
Chemical Society which produces bibliographic and chemistry databases CASRegistryNumber, unique numerical identifiers for chemical substances Cognitive Assessment...
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Classification and Labelling of Chemicals Lists of UN numbers Dangerous goods CASregistrynumber List of NA numbers "Title 49 - Part 173 - Subtitle B - Chapter I...
compound with the formula C3H8S. It has the CASRegistryNumber 75-33-2. It is REACH registered with the European number of 200-861-4. It is a water-white liquid...
referred to as a code or id code. For instance the ISO/IEC 11179 metadata registry standard defines a code as system of valid symbols that substitute for...
It has the CASRegistryNumber of 536-60-7 and the IUPAC name of (4-propan-2-ylphenyl)methanol. It is REACH registered with the EC number of 208-640-4...
Acrylonitrile styrene acrylate (ASA), also called acrylic styrene acrylonitrile, is an amorphous thermoplastic developed as an alternative to acrylonitrile...
chemical literature, and provides a numerical identifier, known as CASregistrynumber to each chemical substance that has been reported in the chemical...
molecular weight polyphosphates include Kurrol's salt and Maddrell's salt (CAS#10361-03-2). These species have the formula [NaPO3]n[NaPO3(OH)]2 where n...
Tuinal was the brand name of a discontinued combination drug composed of two barbiturate salts (secobarbital sodium and amobarbital sodium) in equal proportions...
Maritime pine bark extract is an extract from the bark of Pinus pinaster which is used as a dietary supplement. It is composed mostly of proanthocyanidins...
Exagamglogene autotemcel, sold under the brand name Casgevy, is a gene therapy used for the treatment of sickle cell disease and transfusion-dependent...
Fluorexetamine (3'-Fluoro-2-oxo-PCE, 3-FXE) is a recreational designer drug from the arylcyclohexylamine family, with dissociative effects. It has reportedly...
Hexahydrocannabiphorol (HHCP, sometimes mistakenly referred to as hexahydroxycannabiphorol) is a semi-synthetic cannabinoid derivative which has been marketed...
Polyether ether ketone (PEEK) is a colourless organic thermoplastic polymer in the polyaryletherketone (PAEK) family, used in engineering applications...
Inotodiol is an anti-inflammatory sterol isolated from Inonotus obliquus. Ma, L; Chen, H; Dong, P; Lu, X (2013). "Anti-inflammatory and anticancer activities...
organic compound with one carboxyl and two hydroxy groups. It has the CASRegistryNumber of 4767-03-7. DMPA is an odorless free flowing white crystalline...
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