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1. What is AdBlue?

AdBlue® is the registered trademark of AUS 32 (aqueous urea solution 32.5%). The product consists of highly pure aqueous urea solution (32.5%) and demineralised water (67.5%) and it is used as an additional solution in diesel engines that have a selective catalytic reduction system (SCR).

2. To which standards AdBlue must correspond to?

The qualitative features of AdBlue® must correspond to ISO 22241 standards.

3. What do Euro 4 and Euro 5 stand for?

Euro 4 and Euro 5 are exhaust gas standards for diesel vehicles determined by the European Union. The exhaust gas standards regulate the permitted quantities of NOx emissions (nitrous oxides), hydrocarbons and carbon monoxide. Euro 4 was implemented form October 2005 till October 2006, Euro 5 was implemented from October 2008 till October 2009. Euro 4 provides 3.5 g/kWh as the maximum limit for NOx emissions and with Euro 5 this quantity is 2.0 g/kWh.

4. What is SCR technology?

SCR or selective catalytic reduction system means that only the NOx emissions are reproduced as N2 and H2O in a specific catalytic converter (that is why this process is called selective).

Most of the European diesel vehicle manufacturers have chosen this method to meet the new ecological standards. The main components of SCR system are the SCR catalyst, sprinkling device, AdBlue tank and the feeder. As the result of a chemical reaction the dangerous NOx molecules turn into harmless N2 and H20 in the catalytic converter.  Ammonia is separated from AdBlue solution by using temperature and water.

Warning! The operation of system without the AdBlue solution can cause a breakdown of the SCR catalytic converter. The recovery of the system is only possible when the faulty SCR catalytic converter is replaced with the new one.

5. Where can I buy AdBlue solution?

In Europe AdBlue is available in gas stations, spare parts stores, service stations and at distributors.

For one or several vehicles AdBlue should be bought in 20 l cans. For middle-sized and large service stations we recommend to buy an IBC container (1 t) and for very large vehicle fleets to mount a stationary container.

6. How much does AdBlue cost?

The current market price of AdBlue can vary depending on the quantity of the solution. In Europe it costs approximately half of the price of diesel litre. In Russia the price is somewhat higher, because transportation and customs costs must be added.

7. How much AdBlue do I approximately need for one vehicle?

In case of Euro 4 vehicle, the consumption of AdBlue is about 4% of the used diesel fuel, with Euro 5 vehicles this quantity is approximately 6%. It roughly makes 1.5-2 l of AdBlue per 100 km. So the annual quantity of AdBlue per average truck, considering the kilometrage and the type of the vehicle, is 1,500-2,000 l. With a 120 l tank it is possible to drive about 10,000 km.

8. What aspects should be kept in mind when supplying and storing AdBlue?

In order to retain AdBlue’s quality, the following should be kept in mind:

- It is advisable to keep the storage temperature below +30 ˚C
- The freezing temperature of AdBlue is -11 ˚C
- Avoid direct sunlight
- Long-term storage at over +30 ˚C reduces AdBlue’s period of validity
- AdBlue solution must be kept in sealed original containers in order to avoid pollution

9. What is the storage life of AdBlue?

The minimal period of validity is 6-36 months, depending on the storage temperature.

10. Can AdBlue solution freeze?

Yes, the freezing temperature of AdBlue is -11.5 ˚C.

11. Is it possible to use AdBlue after it has frozen?

Yes. If AdBlue has uncongealed, it can be used again.
Even the first drops of melted AdBlue are with the same qualities determined in the technical requirements.

12. Is AdBlue flammable?


13. Can AdBlue cause corrosion?


14. Which measures should be taken when AdBlue solution is spilt on the truck?

AdBlue® should be rinsed off with water and the surface of the truck should be cleaned. If AdBlue® dries and crystallizes, it may cause corrosion.