Airgas’ AiRx Diesel Exhaust Fluid (DEF) has been certified by the American Petroleum Institute (API) for use in Selective Catalytic Reduction (SCR) systems to reduce diesel exhaust pollutants. API certification verifies that manufacturers and distributors are operating in compliance with industry standards.

“In order to meet 2010 clean air regulations, most diesel truck manufacturers are using SCR technology in all new models,” said Ted Schulte, Airgas Specialty Products president. “With this technology, DEF is injected into the exhaust stream to break down harmful nitrogen oxides into inert nitrogen and water.” (Source: BusinessWire, September 17, 2009).

Contact: Barry Strzelec, Investor Relations, Airgas, Inc., (610) 902-6256,,