The environment is damaged by all the pollutants that vehicles produce from burning fuel. Therefore, all HGVs manufactured after 2006 are legally required to complete a process called SCR (Selective Catalytic Reduction) to combat the issue. AdBlue is one the necessary components to complete this process. It makes the exhausts from vehicles harmless to the environment by converting the nitrogen oxides into nitrogen and water.


Water makes up almost 70% of AdBlue, while the rest if a solution of aqueous urea. Around the world, it is used widely in the chemical and motor industries. AdBlue needs to comply with the DIN 70070 standard.

AdBlue is considered as a safe product as it is not flammable or poisonous. It is a synthetic exhaust fluid that is unscented and colourless

When the nitrogen oxides are combined with ammonia, it creates a chemical reaction in which water and nitrogen are released. SCR makes the vehicle run better and makes the particulates that are released smaller. Power stations, fossil fuels, gas turbines, train diesel machines and big marine dedicated units have been using this process since the 1980s. Below you will find detailed formula for it:

NO + NO2 + 2 NH3 N2 + 3 H2O

When oxygen is present, the formula changes to:

4 NO + O2 + 4 NH3 4 N2 + 6 H2O

6 NO2 + 8 NH3 7 N2 + 12 H2O

Larger vehicles with specified AdBlue tanks can exhaust the ammonia directly. However, standard cars will have difficulties in applying SCR technology as it hard for petrol stations to store AdBlue. Also, small cars will not have the space for a separate AdBlue tank. The regular urea technique in the form of a solution – AdBlue – was vital for two reasons: this produce is not titled as a hazardous substance, there is no hazard in the incidence of leakages and it’s easy to store similarly aboard automobiles and at lorry buildings, in spite of the problem that it creams at heats below -11°C.

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