UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.     )

Filed by the Registrant  x                            Filed by a Party other than the Registrant  ¨

Check the appropriate box:

¨ Preliminary Proxy Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Proxy Statement

x Definitive Additional Materials

¨ Soliciting Material Pursuant to §240.14a-12

Airgas, Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x No fee required.

¨ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1) Title of each class of securities to which transaction applies:

(2) Aggregate number of securities to which transaction applies:

(3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee is calculated and state how it was determined):

(4) Proposed maximum aggregate value of transaction:

(5) Total fee paid:

¨ Fee paid previously with preliminary materials.

¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 240.0-11 and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

(1) Amount Previously Paid:

(2) Form, Schedule or Registration Statement No.:

(3) Filing Party:

(4) Date Filed:

		Airgas, Inc.
		259 N. Radnor-Chester Road
		Suite 100
		Radnor, PA 19087-5283
	News Release	www.airgas.com

Media Contact:		Investor Contact:
Jay Worley	Joele Frank / Dan Katcher / Andrew Siegel	Barry Strzelec
jay.worley@airgas.com	Joele Frank, Wilkinson Brimmer Katcher	barry.strzelec@airgas.com
(610) 902-6206	(212) 355-4449	(610) 902-6256

For release: Immediately

AIRGAS BOARD OF DIRECTORS TO REVIEW

REVISED UNSOLICITED TENDER OFFER FROM AIR PRODUCTS

Stockholders Advised to Take No Action Pending Review

RADNOR, PA – September 6, 2010 – Airgas, Inc. (NYSE: ARG) today noted that Air Products & Chemicals, Inc. (NYSE: APD) (“Air Products”) has announced a revised tender offer to acquire all outstanding common shares of Airgas at a price of $65.50 per share in cash. The closing price of Airgas common stock on Friday, September 3, 2010 was $66.67.

Consistent with its fiduciary duties and as required by applicable law, the Airgas Board of Directors will review the revised tender offer to determine the course of action that it believes is in the best interests of the Company and its stockholders. Airgas stockholders are advised to take no action at this time pending the review of the revised offer by the Airgas Board of Directors.

Bank of America Merrill Lynch and Goldman, Sachs & Co. are serving as financial advisors, and Wachtell, Lipton, Rosen & Katz is serving as legal counsel to Airgas and its Board of Directors.

About Airgas, Inc.

Airgas, Inc. (NYSE: ARG), through its subsidiaries, is the largest U.S. distributor of industrial, medical, and specialty gases, and hardgoods, such as welding equipment and supplies. Airgas is also one of the largest U.S. distributors 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. More than 14,000 employees work in approximately 1,100 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.

# # #

IMPORTANT INFORMATION

In connection with its 2010 Annual Meeting of Stockholders, Airgas, Inc. has filed a definitive proxy statement on Schedule 14A with the Securities and Exchange Commission (the “SEC”). INVESTORS AND STOCKHOLDERS OF AIRGAS ARE URGED TO READ THE PROXY STATEMENT FOR THE 2010 ANNUAL MEETING IN ITS ENTIRETY BECAUSE IT CONTAINS IMPORTANT INFORMATION. In response to the tender offer proposed by Air Products and Chemicals, Inc. referred to in this communication, Airgas has filed with the SEC a Solicitation/Recommendation Statement on Schedule 14D-9, as amended. STOCKHOLDERS OF AIRGAS ARE ADVISED TO READ AIRGAS’ SOLICITATION/ RECOMMENDATION STATEMENT ON SCHEDULE 14D-9, AS AMENDED, IN ITS ENTIRETY BECAUSE IT CONTAINS IMPORTANT INFORMATION. This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities of Air Products. Investors and stockholders will be able to obtain free copies of Airgas’ definitive proxy statement, the Solicitation/Recommendation Statement on Schedule 14D-9, any amendments or supplements to the proxy statement and/or the Schedule 14D-9, any other documents filed by Airgas in connection with the 2010 Annual Meeting and/or the tender offer by Air Products, and other documents filed with the SEC by Airgas at the SEC’s website at www.sec.gov. Free copies of the definitive proxy statement, the Solicitation/ Recommendation Statement on Schedule 14D-9, and any amendments and supplements to these documents are also available in the “Investor Information” section of the Company’s website at www.airgas.com, or through the following web address: http://investor.shareholder.com/arg/airgascontent.cfm. Airgas and its directors and certain of its executive officers may be deemed to be participants in the solicitation of proxies in connection with its 2010 Annual Meeting. Detailed information regarding the names, affiliations and interests of Airgas’ directors and executive officers is available in the definitive proxy statement for the 2010 Annual Meeting, which was filed with the SEC on July 23, 2010. To the extent holdings of Airgas securities have changed, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC.

FORWARD-LOOKING STATEMENTS

This presentation contains statements that are forward looking. Forward-looking statements include the statements identified as forward-looking in the Company’s press release announcing its quarterly earnings, as well as any statement that is not based on historical fact, including statements containing the words “believes,” “may,” “plans,” “will,” “could,” “should,” “estimates,” “continues,” “anticipates,” “intends,” “expects” and similar expressions. All forward-looking statements are based on current expectations regarding important risk factors and should not be regarded as a representation by us or any other person that the results expressed therein will be achieved. Airgas assumes no obligation to revise or update any forward-looking statements for any reason, except as required by law. Important factors that could cause actual results to differ materially from those contained in any forward-looking statement include the factors identified in the Company’s press release announcing its quarterly earnings, as well as other factors described in the Company’s reports, including its March 31, 2010 Form 10-K, subsequent Forms 10-Q, and other forms filed by the Company with the Securities and Exchange Commission. The Company notes that forward-looking statements made in connection with a tender offer are not subject to the safe harbors created by the Private Securities Litigation Reform Act of 1995. The Company is not waiving any other defenses that may be available under applicable law.