CAS Content

The world's largest collection of publicly disclosed information on chemistry and related research

CAS offers the most comprehensive, timely information pertaining to chemistry and related sciences covering a comprehensive range of scientific disciplines, including biomedical sciences, chemistry, engineering, materials science and agricultural science, among many others.

For more information, check out CAS content at a glance.

The greatest depth and breadth of information about chemistry and related sciences

CAS databases contain more than 142 million unique organic and inorganic chemical substances, such as alloys, coordination compounds, minerals, mixtures, polymers and salts, and more than 67 million sequences—more than any other database.

With worldwide coverage of thousands of scientific journals and 63 patent authorities plus patent families, citations and more, the CAS databases provide unparalleled access to chemistry and other related scientific disciplines.

The most timely scientific information

CAS databases are your source for the most current scientific information:

  • CAS REGISTRYSM - the authoritative source for molecular substance information and CAS Registry Numbers® (CAS RNs or CAS Numbers) is updated daily. 

  • Chemistry-related patents from nine major patent offices are available online in CAplus within two days of the patents' issuance and fully indexed by CAS scientists in 27 days or less from the date of issue.

  • CAplus is updated daily and has more than 47 million records.

  • Bibliographic information and abstracts for all articles in more than 1,500 core journals are added to CAplus within seven days.

Intellectually analyzed content

CAS editorial scientists build the highest quality and most up-to-date chemical databases in the world.  Content includes:

  • Concept information - important scientific concepts, e.g., diseases, processes and techniques as well as a statement about the nature of the study

  • Comprehensive substance information - specific, generic, prophetic and Markush substances, trade names, trivial names, systematic names, synonyms and molecular formulas

  • CA Lexicon - built using queries that ensure comprehensive results

    • Search using the same terms by which CAS indexes chemistry in its databases

    • Ensures more precise answers

    • Helps users find the most relevant results among historical information

Links from references to electronic journal and patent documents and other reputable web sources

With CAS' powerful online information products, you can access the world’s largest collection of information on disclosed chemistry and related research.

  • Cited reference links dating back to the beginning of the late 19th century

  • Links to journal articles via CAS Full Text Options

  • Links to the full text of five major patent offices via CAS Full Text Options

  • Access to hard to find chemistry in full text patents directly in SciFinder via  PatentPak

You can access CAS databases through:

CAS Content

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