CAS Common Chemistry
Search by chemical compound name, SMILES, InChI or CAS Registry Number® (CAS RN®)
e.g. aspirin, sodium chloride, 58-08-2, C=O
CAS 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, is provided in alignment with our mission as a division of the American Chemical Society.
Access the CAS Common Chemistry chemical database via API (application programming interface) to support workflow integration, chemical research and cheminformatics.
Full access to the CAS content collection is available through custom data and analytics solutions or in CAS products such as SciFindern and STNext®.