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  1. CAS REGISTRY®

    CAS REGISTRY®, the CAS substance collection, is the premier source relied upon by scientists and regulators worldwide for accurate information on chemical substances.

  2. CAS Number Search - NIST Chemistry WebBook

    CAS registry numbers are copyrighted by the American Chemical Society. Redistribution rights for CAS registry numbers are reserved by the American Chemical Society.

  3. Chemical Abstracts Service - Wikipedia

    CAS (Chemical Abstracts Service) is a division of the American Chemical Society. It is a source of chemical information and is located in Columbus, Ohio, United States.

  4. CAS Common Chemistry

    Quickly confirm chemical names, CAS Registry Numbers®, structures or basic physical properties by searching compounds of general interest or leveraging an API connection.

  5. CAS SciFinder - Chemical Compound Database

    Access the world’s most comprehensive chemical substance and reaction data. Search by structure, name, CAS Registry Number®, or spectra data. Uncover relevant literature, patents, and regulatory …

  6. Empowering Innovation & Scientific Discoveries | CAS

    3 days ago · CAS provides solutions and services that help empower scientific discoveries. Learn how CAS can facilitate your research and drive innovation.

  7. CAS Data

    3 days ago · The CAS reference collection aggregates and connects scientific knowledge from thousands of journals and other sources published globally in more than 50 languages dating back to …

  8. About CAS

    3 days ago · CAS builds the world’s largest collection of human-curated scientific knowledge covering over 150 years of published science. Our tools are designed to address the challenges and …

  9. CAS Content

    Covering advances in chemistry and related sciences over the last 150 years, the CAS Content Collection empowers researchers, business leaders, and information professionals around the world …

  10. Identify chemical substances | CAS SciFinder

    Access current, accurate chemical substance information powered by a comprehensive database.