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CAS Reactions

The CAS reactions collection provides detailed and dependable data on more than 150 million single and multi-step reactions.

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More than 150 million single- and multi-step reactions published in journals, patents, dissertations, and other sources since 1840.

Covers organic and organometallic reactions. Total syntheses of natural products, and biotransformation reactions.

Scientist-curated and enhanced with yield data, detailed reaction conditions, defined substance roles, and experimental procedures.

Daily updates keep you current on the most recent discoveries.

Connections to relevant publications, substance properties, suppliers, and more within the CAS Content Collection™.

Searchable by structure, reaction role, functional group, reaction site, atom mapping, and more.

Latest from CAS Insights™

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極限環境微生物は、地球上で最も過酷な環境下で生きる微生物です。そのユニークな能力が今、生物医学、環境浄化などにどのような変化をもたらしているのかをご覧ください。
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安全性

Webinar: PFAS Research, Definitions, and Regulatory Developments

From pharmaceuticals to semiconductors, PFAS compounds are everywhere. This ACS/CAS webinar recap explores how evolving structural definitions are changing the regulatory landscape, and what it means for science, policy, and innovation.
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バイオテクノロジー

Molecular de-extinction opens possibilities for new antibiotics

Molecular de-extinction revives genes and proteins from ancient sources, and it may hold the key to new antibiotics that fight drug-resistant pathogens.
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