CAS is the only organization in the world whose objective is to find, collect and organize all publicly disclosed substance information.

We build and maintain the world's largest collection of molecular substances, reactions, and related content that is vital to the work of researchers.

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2014 SciFinder Future Leaders in Chemistry

Our 2014 SciFinder Future Leaders in Chemistry will be announced in early May!

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CAS and PerkinElmer collaborate to combine the power of two leading research solutions.

Tour the CAS Data Center!

Join us for a behind-the-scenes look at how CAS delivers the largest, most timely and authoritative collection of chemical information in SciFinder® and STN® to meet your research needs.

STN - A Reliable Partner in Pharmacovigilance

The World's Authority for Chemical Information

Learn why scientists rely on the world's largest, most comprehensive databases, only at CAS.


SciFinder provides access to CAS content and delivers the information they need to:

  • increase productivity
  • achieve faster breakthroughs
  • make better decisions

With SciFinder you get:

  • more reactions
  • more substances
  • more biomedical content

at your fingertips than with any other source.

SciFinder Quote
Robert Koechley
Director of Information Management
Promega Corporation

The intuitive, award-winning application offers instant access to the most comprehensive collection of chemical substance and reaction information, and to more references than any other scientific search service.

Patent Experts 

Information professionals and patent searchers worldwide rely on STN as their scientific and technical resource of choice.

The world's major patent offices depend on
STN for:

  • precise searching
  • comprehensiveness
  • timeliness
  • high-quality coverage

of science and intellectual property information.

STN provides access to key scientific and intellectual property databases and is the premier single source for the world's disclosed scientific and technical research.

STN is operated jointly by CAS and FIZ Karlsruhe worldwide and is represented in Japan by JAICI.


No one else has more...

A global team of scientists is continually adding substance information from the world's disclosed chemistry to the CAS REGISTRYSM, the gold standard for chemical substance information.


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