CAS Reactions

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

Contact us
Hexagon shaped overlay

Features

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™

Safety

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.
|Article
Biotechnology

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.
|Article
Drug Discovery

Emerging drug discovery trends explored in CAS Insights webinar

From microbiome breakthroughs to AI-powered simulations, this CAS Insights webinar recap explores the latest drug discovery trends shaping pharmaceutical research.
|Webinar