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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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Mechanochemistry: A green pathway for chemical reactions and advanced manufacturing

Reducing or removing solvents results in greener chemistry and less waste. Mechanochemistry uses forces like milling and grinding to drive chemical reactions, and it’s becoming a key approach to environmentally friendly catalysis, biomedicine, and more.
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Reading the Circuits: ACS/CAS microelectronics webinar recap

Summary of our recent webinar, featuring experts from CAS, the National Institute of Standards and Technology (NIST), and the University of Manchester, discussing the research landscape of microelectronics research and breakthroughs.
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エマージング・サイエンス

Fossil fuels to biofuels: How biomass can drive sustainability

Biomass is currently just a fraction of our energy sources, but with more sustainable feedstocks and conversion processes, biomass-based chemicals and fuels could become common replacements for fossil fuel-based materials.
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