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CAS-nummer

Screenshot af CAS Common Chemistry database med information om koffein (caffeine) (58-08-2).

CAS-numrene er unikke talkombinationer, der bruges til at identificere kemiske forbindelser.[1] Ethvert kemikalium, der beskrives i litteraturen, bliver tildelt et CAS-nummer af "Chemical Abstract Service", der er en afdeling af "The American Chemical Society". I marts 2009 er der tildelt over 43 millioner CAS-numre, og der kommer dagligt nye til. CAS-numrene har ingen mening i sig selv (de kan nærmest betragtes som en form for "serienummer"), og formålet med dem er, at de skal gøre søgninger i kemiske databaser lettere, da mange stoffer har flere navne. Man kan søge på CAS-nummeret i de fleste større databaser over kemikalier. CAS-numrene bruges internationalt.[2] A collection of almost 500 thousand CAS registry numbers are made available under a CC BY-NC license at ACS Commons Chemistry.[3]

Registret rummer mange slags stoffer, og heriblandt også verdens største samling af:

Referencer

  1. ^ CAS registry description Arkiveret 2008-07-25 hos Wayback Machine, by Chemical Abstracts Service
  2. ^ Chemical Substances – CAS REGISTRY
  3. ^ "CAS Common Chemistry expands collection of publicly available chemical information". CAS (engelsk). Hentet 17. marts 2021.
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CAS-nummer
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