Hi-Tec Blue Air is a non-toxic aqueous 32.5% urea solution used to chemically reduce NOx emissions from heavy-duty diesel-powered vehicles. It is not a dangerous good, nor harmful to the environment, and is classified in the minimum-risk category of transportable fluids. Hi-Tec Blue Air can simply be washed off with water should it be spilled on an operator’s hand.
Hi-Tec Blue Air is neither a fuel nor a fuel additive and needs to be used in a dedicated tank on the heavy-duty vehicle. It is replenished in a similar way to refueling diesel (about 4-5% by volume of diesel consumption for ADR 80/01 and about 5-6% for ADR 80/02).
There are different vehicle emission standards around the world, setting specific emission limits for the four main pollutants: Oxides of Nitrogen (NOx), Particulate Matter (PM), Carbon Monoxide (CO), and Hydrocarbons (HC). The use of SCR and Hi-Tec Blue Air technology addresses the NOx component of these standards and commenced with the introduction of Euro IV.