Airgas, Inc. is celebrating another vignette of recognition, with the news that its AiRx Diesel Exhaust Fluid has been certified by the American Petroleum Institute (API).

Diesel exhaust fluid (DEF) is used in Selective Catalytic Reduction (SCR) technology to reduce harmful diesel exhaust pollutants.

API certification verifies that manufacturers and distributors are operating in compliance with industry standards and that DEF meets quality standards.

Marketed through Airgas Specialty Products, the AiRx Diesel Exhaust Fluid breaks down harmful nitrogen oxides into inert nitrogen and water emissions.

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

“Our nitrogen oxide abatement, or DeNOx, experience with stationary applications, such as coal and natural gas-fired power plants, served us very well in creating Airgas AiRx to work with diesel engine SCR technology in mobile applications,” Schulte continued.

With more than 5,000 vehicles, Airgas maintains one of the largest private truck fleets in the country and will be using Airgas AiRx Diesel Exhaust Fluid in all of its new trucks that use SCR technology.