ATMI Announces Webcast Link for SDS Transaction

To Discuss Acquisition of Full Control of SDS(R) Rights

| Source: ATMI, Inc.

DANBURY, Conn., Oct. 31, 2011 (GLOBE NEWSWIRE) -- ATMI, Inc. (Nasdaq:ATMI) today announced webcast details for its November 1, 2011 conference call scheduled at 11:00 a.m. Eastern time to discuss its acquisition of full control of SDS® rights.

The webcast is available directly at:

It is recommended that you listen via your computer speakers. If for any reason you are unable to stream, you can listen to the audio via telephone:

Conference call dial-in is: 877.766.0748, conference ID: 23746040

The webcast link will also be available at

About ATMI

ATMI, Inc. provides specialty semiconductor materials, and high-purity materials handling and delivery solutions designed to increase process efficiencies for the worldwide semiconductor, flat panel, and life sciences industries. For more information, please visit

The ATMI, Inc. logo is available at

ATMI, the ATMI logo, and SDS are trademarks or registered trademarks of Advanced Technology Materials, Inc., in the United States, other countries, or both.

Dean Hamilton
Director, ATMI Investor Relations & Corporate Communications
203.207.9349, Direct
203.794.1100 x9349