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.

More >>

Happy New Year from CAS

Click "Learn More" to view a holiday greeting from CAS.


2014 Nobel Prize in Chemistry

CAS congratulates Eric Betzig, Stefan W. Hell and William E. Moerner, winners of the 2014 Nobel Prize in Chemistry.

Available Now!

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

Latest Feature on Fracking Technology

A look at recent patenting activity in Fracking Technology


Precise and Professionally Indexed Content

We understand the difference people make to the scientific process.

SciFinder - The choice for chemistry research 

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.

STN - The Choice Of Patent Experts

Intellectual property professionals and patent examiners worldwide rely on STN for their scientific and technical information needs because STN delivers:

  • unique content collection
  • unparalleled search power
  • proven reliability

STN provides an information advantage that empowers you to:

  • answer business-critical questions
  • mitigate risks of missed information
  • protect valuable intellectual property

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.


Contact Us

E-mail   Phone & Fax   800-753-4227 (North America)
    614-447-3700 (Worldwide)
    614-447-3751 (Fax)