[3] In 1944, the company relocated its headquarters from Detroit to Chattanooga, Tennessee, where it expanded its oxygen production manufacturing capacity to meet the needs of the U.S. military and its allies in their war against Nazi Germany and the Axis powers.

[3] Air Products serves customers in technology, energy, healthcare, food, and industrial markets worldwide with atmospheric industrial gases, including oxygen, nitrogen, argon, hydrogen, and carbon dioxide, process and specialty gases, performance materials, and chemical intermediates.

Air Products has had a working relationship with NASA for five decades, supplying the liquid hydrogen used for every Space Shuttle launch and the Mercury and Apollo missions.

[9] In 2013, Air Products' high purity built-in purifier argon was used to determine a more accurate value for the Boltzmann constant.

[13] In January 2017, Air Products completed the sale of its Performance Materials division to Evonik,[14] leaving the company focused on its industrial gases business.