CAS Registry Services℠

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
3D rendering of interconnected blue molecules representing a chemical structure.

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™

創薬

AI in drug discovery: Moving from potential to practical

CAS hosted Life Sciences Summits across three regions in 2025, exploring practical AI integration in drug discovery. Learn about data governance, implementation barriers, and modality-specific challenges.
|記事
エマージング・サイエンス

Nipah virus explained: Risks, realities, and the hope from new research

New Nipah cases in India have renewed focus on a high‑fatality zoonotic threat shaped by complex spillover dynamics, severe neurological disease, and limited medical countermeasures. Meanwhile, global efforts in diagonistcs, therapeutics, and vaccines are accelerating.
|記事
バイオテクノロジー

がん免疫療法における革新:二重特異性T細胞エンゲージャー

二重特異性T細胞エンゲージャーは、製造がより簡単になり、安全性がさらに向上したことにより、免疫療法の重要な治療法となることが期待されています。
|記事