ARG - 3.31.13 - 10-K EX. 23

We consent to the incorporation by reference in the registration statements on Form S-3 (Nos. 33-39433, 33-48388, 33-57893, 33-61301, 33-61899, 33-63201, 33-64633, 333-37863, 333-46266, 333-46739, 333-60995, 333-61989, 333-161774 and 333-167140), Form S-4 (No. 333-23651) and Form S-8 (Nos. 333-42023, 333-75258, 333-100187, 333-117965, 333-136463, 333-137185, 333-161660, 333-170139, 333-174883, 333-175676 and 333-183372) of Airgas, Inc. of our report dated May 22, 2013, with respect to the consolidated balance sheets of Airgas, Inc. and subsidiaries as of March 31, 2013 and 2012, the related consolidated statements of earnings, comprehensive income, stockholders’ equity and cash flows for each of the years in the three-year period ended March 31, 2013, the related financial statement schedule, and the effectiveness of internal control over financial reporting as of March 31, 2013, which report appears in the March 31, 2013 annual report on Form 10-K of Airgas, Inc.