Airgas Announces Pricing Actions Effective November 21, 2005.

RADNOR, Pa. -- Airgas, Inc. (NYSE:ARG) announced that effective November 21, 2005, or as contracts permit, its operating units will increase prices on packaged and bulk gases and other products. Prices will increase, on average, as follows:

--6%-8% for carbon dioxide, dry ice, specialty gases and medical gases

--8%-10% for certain packaged and bulk industrial gases, including oxygen and nitrogen

--12%-15% for hydrogen, helium, acetylene and other fuel gases

"We are in a period of tight supply and high demand, which combined with unprecedented increases in raw material costs, higher operating costs, including rising utility and labor costs, all factor into our need to take these actions," said Airgas Chairman and Chief Executive Officer Peter McCausland. "We will continue to work very hard to provide products to our customers efficiently through the strongest network in the business."

About Airgas, Inc.

Airgas, Inc. (NYSE:ARG), through its subsidiaries, is the largest U.S. distributor of industrial, medical, and specialty gases, and related hardgoods, such as welding equipment and supplies. Airgas is also the third-largest U.S. distributor of safety products, the largest U.S. producer of nitrous oxide and dry ice, the largest liquid carbon dioxide producer in the Southeast, and a leading distributor of process chemicals, refrigerants and ammonia products. Its 10,000 employees work in about 900 locations including branches, retail stores, gas fill plants, specialty gas labs, production facilities and distribution centers. Airgas also distributes its products and services through eBusiness, catalog and telesales channels. Its national scale and strong local presence offer a competitive edge to its diversified customer base. For more information, please visit www.airgas.com.

Forward-Looking Statements

This press release may contain statements that are forward looking, as that term is defined by the Private Securities Litigation Reform Act of 1995 or by the Securities and Exchange Commission in its rules, regulations and releases. These statements include, but are not limited to, statements regarding: anticipated price increases for the Company's products and services effective November 21, 2005; and the Company's plan to continue to work hard to efficiently distribute products to its customers. The Company intends that such forward-looking statements be subject to the safe harbors created thereby. All forward-looking statements are based on current expectations regarding important risk factors and should not be regarded as a representation by the Company or any other person that the results expressed therein will be achieved. Important factors that could cause actual results to differ materially from those contained in any forward-looking statement include: the Company's inability to successfully implement the price increases; an economic downturn; increased industry competition; adverse changes in customer buying patterns; significant political and economic uncertainties associated with current world events; and other factors described in the Company's reports, including Form 10-K dated March 31, 2005 and Form 10-Q dated June 30, 2005 filed by the Company with the Securities and Exchange Commission.