Looking up CAS

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CAS registry number is the unique identification number assigned by Chemical Abstract Service for every chemical substance identified in open scientific literature. Looking them up could be a tedious task.

There are several CAS lookup APIs services:

PUBMED : https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/[CAS]/property/CanonicalSMILES/JSON
CAS.org : https://commonchemistry.cas.org/api/detail?cas_rn=[CAS]