The CAS Content Collection™

Discover what's inside the CAS Content Collection

Spanning over 150 years of scientific discoveries from around the world published in journals , patents , and a wealth of other sources , the CAS Content Collection provides a comprehensive foundation to inform confident decisions throughout your innovation process.

300 MILLION

Substances

110

Patent authorities

50+

Languages

160 MILLION

reactions

CAS Data overview

Chemistry

The foundational chemical data that underpins discovery:

Substances - CAS REGISTRY®

Chemical formulations

Commercial sources

Reactions

Physical properties and spectra

Methods protocols

Markush

Hazard designation

Life sciences data

Biological and pharmacological data integrated with chemistry

Explore CAS Life Sciences Data

Materials data

Specialized data for materials science and engineering:

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Documentation

Access detailed information about CAS coverage, classifications, and indexing standards. Find journal coverage lists, patent classifications, standard abbreviations, and transition guides.

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Regulatory and compliance coverage

CAS data spans hundreds of global regulatory lists, including EU REACH, TSCA, OECD, and the Chemical Weapons Convention. Compliance, legal, and R&D teams get a single, authoritative source for chemical regulatory status worldwide.

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Documentation

Coverage, classifications, indexing standards, and more

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"It is very challenging for humans to collect accurate data from a vast body of literature and transform it into a structured, AI-ready format… CAS did a great job supporting us."

Co-founder and Vice President

Contract Research Organization

Over a century of scientific knowledge management expertise

For over 100 years, CAS has been developing solutions to make scientific knowledge more accessible and valuable to enable scientific discovery. Now you can engage our unique knowledge management expertise and specialized technologies to help overcome scientific data challenges hindering your R&D workflows.

See our expertise in action

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Your data, enhanced with our expertise

Let us apply our specialized expertise to enhance your proprietary scientific information. Through the CAS Intelligence Hub℠, we help organizations clean and harmonize fragmented datasets, build AI‑ready information assets, and unlock deeper insights across their scientific knowledge.

Learn about CAS Intelligence Hub℠