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Our log-in process has changed. Your ACS Member Number will no longer serve as your username and password. ACS members need an ACS ID to access member-only content.

* Subscribers Log In Here With Your ACS ID



Not Registered?

What is an ACS ID?

The ACS ID is a single set of log-in credentials (i.e., user name and password) used to access multiple ACS online products, including:

  • ACS Publications journals
  • C&EN Online*
  • www.acs.org
  • ACS Network**

Do I have an ACS ID?

If you registered on www.acs.org before Nov. 15, you can use that user name and password (your ACS ID) to log in.

How do I get an ACS ID?

Creating one is free and will only take a few minutes. Register now.


Contact ACS Member Services by email or phone.

  • 800-333-9511 (US only)
  • 614-447-3776 (outside the US)

Customer Service representatives are available Mon. ??? Fri., except holidays, from 8:30 a.m ??? 5:00 p.m. ET.

* Access to C&EN Online subscriber content is only available to ACS Members.

Become an ACS Member today.

** The ACS Network is only available to ACS Members, ACS Student Affiliates, and ACS Global Partners.

Learn more about the ACS Network.