The CAS Content Collection™

Discover what's inside the CAS Content Collection

The CAS Content Collection spans 150+ years of scientific research from 109 patent authorities and publications in 50+ languages worldwide. Our data encompasses diverse sources, including patents, references, and life science data sets to support your critical decisions.

300M+

Substances indexed

109

Patent authorities

50+

Languages

Browse the data that powers research

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:

Documentation

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

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Regulatory and compliance coverage

CAS data spans hundreds of regulatory lists, including those from EU REACH and TSCA to OECD and the Chemical Weapons Convention. Compliance, legal, and R&D teams get a single, authoritative source for chemical regulatory status worldwide, without having to monitor and reconcile those lists independently.

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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

A century of scientific knowledge management

Building the world's largest curated scientific data collection is not just what we have done; it is what we do. For over 100 years, CAS has pioneered the science of organizing and connecting scientific information.

Three overlapping circles diagram showing Domain Expert, Tech Algorithm Expert, and Content Expert collaboration model

Your data, powered by our expertise

This same expertise can be applied to your proprietary scientific information. Through the CAS Intelligence Hub℠, organizations can harmonize fragmented datasets, build AI‑ready information assets, and unlock deeper insights across their scientific knowledge.

Learn about CAS Intelligence Hub℠