Air Products and Chemicals, Inc. is an American international corporation whose principal business is selling gases and chemicals for industrial uses. Air Products’ headquarters is in Allentown, Pennsylvania, in the Lehigh Valley region of Pennsylvania, in the United States. Air Products is the Lehigh Valley’s third largest employer, after Lehigh Valley Hospital and St. Luke’s Hospital. Leonard P. Pool founded the company in 1940. Its French subsidiary, headquartered in Saint-Quentin-Fallavier, was the site of a terrorist attack on June 26, 2015.[3] Air Product’s current CEO and Chairman is Sefi Ghasemi. On September 17, 2015 Air Products announced its intent to spin off its Materials Technologies business.[4] This new stand alone company has been renamed Versum Materials.