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We facilitate your research to fuel tomorrow's innovation.

Together, we will do great things.

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Our solutions empower researchers and enable discovery.


MethodsNow® is a 2017 CODiE Winner for the Best Content Search & Discovery Solution


Now Available, 2017 ACS Calendar



2017 SciFinder® Future Leaders Program

An exclusive opportunity for Ph.D. students and postdoctoral researchers from around the world.


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

  • increase productivity
  • achieve faster breakthroughs
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With SciFinder you get:

  • more reactions
  • more substances
  • more biomedical content

at your fingertips than with any other source.


And now PatentPak®, a robust new patent workflow solution, offers instant access to hard-to-find chemistry in full-text patents directly in SciFinder.

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
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STN provides an information advantage that empowers you to:

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View the STN Digital Brochure


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.


Special Message

Our hearts go out to all of those impacted by Hurricane Harvey. In the wake of this unprecedented disaster, ACS is reviewing all options to support its members in the affected areas. If you need assistance from ACS, or have suggestions on how we can help, please send a message to - ACS President Allison Campbell

CAS, a division of the ACS, echoes Dr. Campbell’s message. If you need assistance from CAS, please contact us at

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