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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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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™

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Molecular de-extinction opens possibilities for new antibiotics

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新興の科学分野

Nobel Prize winners

Discover how Nobel-winning science unfolds—from breakthrough ideas to global recognition. CAS Insights reveals the context, challenges, and impact behind these discoveries.
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創薬

Theranostics: How nuclear medicine is changing precision oncology

Nuclear medicine's theranostics approach enables "see it, treat it" cancer therapy using the same agents for diagnosis and treatment. Investment tripled to $14.86B in 2024 as these precision treatments move to early-stage care.
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