AUS40 marine information

AUS40 for marine ISO18611 applications is a blend of demineralised water and urea (urea content 40%). AdBlue is a blend of demineralised water and urea (urea content 32.5%). Both of these fluids act as reduction agents for SCR (Selective Catalytic Reduction) technology for NOx emission control. Whether you choose AdBlue or AUS40 depends on your vessel. AUS40 has a higher concentration of urea and is more efficient for larger vessels, while AdBlue is more delicate and therefore more suitable for small engines.

What is AUS40 ?

AUS40 is special urea solution that contains 40% (automotive grade) urea. AUS40 can be used in heavy-duty engines equipped with SCR (Selective Catalytic Reduction) systems and is especially suitable for NOx reduction in marine vessels and industrial combustion plants.

Specification AUS40

Production of AUS40

All GreenChem blending sites are able to produce AUS40, a solution made of high spec pure automotive urea and demineralised water. There are 22 production locations throughout Europe that can produce AUS40 and can perform bulk deliveries in a wide range of countries.

AUS40 is very similar product to AdBlue in terms of storage and handling, although there are some specific properties which need to be taken into account.

Our number of production locations affords us very high production flexibility and a high level of delivery security. 


For more information on storage and handling: Download the AUS40 - MSDS


Storage of AUS40

Essentially, all storage requirements of AdBlue are applicable on AUS40. There is a difference in the temperature: AUS40 should be stored between 5°C and 25°C. Temperatures below 0°C are to be avoided, as well as temperatures above 30°C. AUS40 begins to freeze at 0°C; once thawed, it can be used again. AUS40 should be stored in a closed, dry room with good ventilation. There is no specification for the maximum quantity of stored AUS40.


Quality of AUS40

AUS40 quality is important for the proper functioning of your exhaust gas aftertreatment equipment, particularly for SCR catalyst activity. Impurities in your AUS40 may cause blockages and crystallisation, which can disrupt the SCR system. Take the utmost care when dispensing AUS40 and keep out of contact with other substances. All quality requirements of AdBlue are also applicable to AUS40. Learn more about the quality of AdBlue by clicking on the YouTube video link..