AdBlue® is a registered trademark of the Verband der Automobilindustrie (VDA) and is designed to be used in Selective Catalytic Reduction (SCR) process for diesel engine systems to lower nitrogen oxides (NOx) concentration. The AdBlue® solution consists of 31.8~33.2% highly purified urea and demineralized water. The product is colorless, odorless and safe to handle. The solution may be also referred to as Diesel Exhaust Fluid (DEF) in North America and ARLA32 in Brazil. For us, we name it – Dr. Blue。

The process is to convert nitrogen oxides (NOx) into nitrogen gas (N2) and water (H2O) with the addition of a catalyst. Ammonia from urea solution reacts with NOx from the exhaust emission to reduce the harmful substances from combustion diesel engine. For a long time, the method has been applied in other industries, such as incinerators and power plants, to treat flue gas. In recent years, SCR was brought into automobile diesel engine to control exhaust and achieve emission standards set by the European Union and the United States Environmental Protection Agency (EPA).

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The product must be placed in a cool location with good ventilation, away from direct sunlight. Keep the temperature between -10℃~35℃ to avoid quality deterioration over time.

VDA is the shorthand for Verband der Automobilindustrie, and AdBlue® is a registered trademark of the association for aqueous urea solution 32.5%. Hence, VDA requires all licensees to follow the ISO standards 22241-1 to 4 to ensure quality for customers.