Marine Urea AUS-40
ISO 18611 certified Marine Urea for all MARPOL Annex VI SCR-equipped vessels. Colorless, mildly scented, non-toxic, and non-flammable. Delivered in IBC containers and by tanker truck.
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Price depends on volume, delivery frequency, and port. We coordinate logistics across Baltic Sea ports.
or call: +372 655 9077What is Marine Urea AUS-40?
Marine Urea, also known as AUS-40, is a 40% urea solution specifically developed for marine SCR catalysts. Unlike AUS-32 (AdBlue) used in road transport, AUS-40 has a higher concentration because large marine engines produce more NOx emissions that require a stronger reagent. The solution is colorless with a mild scent, non-toxic, and non-flammable.
The SCR system injects AUS-40 into the exhaust stream, where high temperature breaks the solution down into ammonia. The ammonia reacts with the toxic nitrogen oxide (NOx) and converts it into harmless compounds: nitrogen (N₂) and water vapor (H₂O). Result: up to 80% less NOx emissions.
40% is the concentration chosen by SCR system manufacturers as optimal, providing effective NOx reduction over longer intervals between port deliveries.
Which vessels must use AUS-40?
- →All vessels built from 2016 onward that operate in Emission Control Areas (ECAs)
- →The Baltic Sea, North Sea, North American waters, and Caribbean region are ECA zones
- →Cargo and container ships, ro-ro ferries, tankers, and cruise ships
- →The requirement derives from IMO MARPOL Annex VI NOx Tier III regulation
Why choose PrimeBlue Marine Urea?
- ✓Produced to the same high quality standards as our VDA-licensed AdBlue
- ✓ISO 18611 compliance certificate for every delivery
- ✓Delivery in IBC containers to port, or by tanker truck directly into the vessel's tank
- ✓We coordinate logistics across Baltic Sea ports
- ✓SDS and product specification available for download
AUS-40 quality is critical
Using low-quality AUS-40 causes impurities to build up in the SCR catalyst, reducing system efficiency. At the next port call, the vessel undergoes NOx emission inspection. Non-compliance results in fines, delays, and a port departure ban. Only use an ISO 18611 certified supplier.
What happens if AUS-40 runs out?
Safe handling
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