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™

Biotechnology

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Drug Discovery

AI-driven advancements in medicinal chemistry: Highlights from the CAS Insights webinar

Highlights from a recent CAS Insights webinar on AI in medicinal chemistry. How CAS BioFinder was used to assist in target prediction for bioactive compounds.
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Emerging Science

Wide bandgap semiconductors: Transforming EVs, UV, and wireless communications

For high-performance technologies in power electronics, energy storage, and optoelectronics, semiconductors need to offer performance beyond standard silicon. Wide bandgap semiconductors can handle the high‑voltage, high‑temperature, and high‑frequency conditions of these emerging applications.
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