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AUS 40 (Aqueous Urea Solution 40%) is a high-purity urea solution designed for marine Selective Catalytic Reduction (SCR) systems to reduce Nitrogen Oxide (
) emissions from ship engines. Composed of 40% urea and 60% deionized water, it converts harmful
into harmless nitrogen (
) and water (
). It is essential for IMO Tier III compliance.
Key Aspects of AUS 40 Aqueous Urea Solution:
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Web results
Wholesale Cargo AUS 40 Aqueous Urea Solution ...
Guangzhou EverBlue Technology Co.,Ltd.
http://www.everbluesolution.com › cargo-aus-40-aqueou...
Guangzhou EverBlue Technology Co.,Ltd.
http://www.everbluesolution.com › cargo-aus-40-aqueou...
Aqueous Urea Solution (AUS) 40 is the Marine Grade Urea Solution for marine applications where Selective Catalytic Reduction (SCR) system is used to reduce ...Read more
AUS 40
CargoChem
https://cargochem.rs › products › aus-40
CargoChem
https://cargochem.rs › products › aus-40
Aqueous urea solution 40 or AUS 40 is the other type of DEF usually used for ships. It reduces Nitrogen Oxide (NOx) emissions from vessels and sometimes ...Read more
Marine Urea Solution AUS 40 - Sinopec Online
sinopeconline.com
https://sinopeconline.com › products › marine-urea-sol...
sinopeconline.com
https://sinopeconline.com › products › marine-urea-sol...
Marine Urea Solution 40%, or AUS 40, is an aqueous high-purity urea solution at a concentration of 40% that is needed to operate converters with SCR in ...
30-day returns
What is AUS40? Your Guide to Marine Urea for IMO NOx ...
urea-worldwide.com
https://www.urea-worldwide.com › articles › what-is-aus...
urea-worldwide.com
https://www.urea-worldwide.com › articles › what-is-aus...
Jul 6, 2025 — AUS40, also known as Aqueous Urea Solution 40%, is a high-purity fluid composed of 40% urea and 60% deionized water. It is specifically ...Read more
Marine Urea Solution 40% - 275 Gallon Tote
BuySinopec.com
https://buysinopec.com › products › marine-def-urea-40-...
BuySinopec.com
https://buysinopec.com › products › marine-def-urea-40-...
Marine Urea Solution 40%, or AUS 40, is an aqueous high-purity urea solution at a concentration of 40% that is needed to operate converters with SCR in ...Read more
$1,099.00In stock onlineIn store ()Free delivery7-day returns
35.7 mi
Marine Urea Solution 40% - 275 Gallon Tote
eBay
https://www.ebay.com › ... › Other Business & Industrial
eBay
https://www.ebay.com › ... › Other Business & Industrial
Marine Urea Solution 40%, or AUS 40, is an aqueous high-purity urea solution at a concentration of 40% that is needed to operate converters with SCR in ...
$1,099.00In stockFree delivery30-day returns
Urea Solution (AUS40) is the Maritime Grade ...
諾瓦材料
https://www.novax-material.com › uploads › files
諾瓦材料
https://www.novax-material.com › uploads › files
PDF
NOx reduction agent, aqueous urea solution at 40 % concentration (AUS 40), which is needed to operate so-called SCR (selective catalytic reduction) ...Read more
2 pages
People also ask
What does urea do to diesel exhaust?
UREA enables the SCR chemical emissions-reduction process that neutralizes NOx, protects air quality, and ensures compliance with strict diesel emissions standards without affecting engine reliability or vehicle operation, sustaining clean diesel mobility and environmental responsibility through catalytic conversion ...
Why UREA is used in diesel engines cars and trucks and at what level
American Petroleum
https://americanpetroleumpr.com › urea-in-diesel-engines
American Petroleum
https://americanpetroleumpr.com › urea-in-diesel-engines
What is urea used for in shipping?
Aqueous Urea Solution (AUS), also known as urea water solution or Diesel Exhaust Fluid (DEF), is a chemical compound that is used in the maritime industry as part of the exhaust gas cleaning process, particularly in selective catalytic reduction (SCR) systems.
Aqueous Urea Solution | Caldic
Caldic
https://www.caldic.com › maritime-chemical-solutions
Caldic
https://www.caldic.com › maritime-chemical-solutions
What is urea solution for ships?
The use of UREA reduces Nitrogen Oxide (NOx) emissions in marine diesel engines. Compliant with ISO standards specifications, UREA AUS40% solution can be used to support NOx emission reduction, assisting your vessels meet existing NECA (NOx Emission Control Area) regulatory requirements.
Urea - SpectrumLabs
Spectrum Labs
https://www.spectrum-labs.gr › services › chemical-lab
Spectrum Labs
https://www.spectrum-labs.gr › services › chemical-lab
Web results
The Role of AUS40 in Reducing NOx Emissions
aus40.com.br
https://www.aus40.com.br › post › the-role-of-aus40-in...
aus40.com.br
https://www.aus40.com.br › post › the-role-of-aus40-in...
Sep 2, 2025 — When injected into exhaust gases, AUS40 reduces NOx emissions by up to 90%, transforming them into harmless nitrogen and water vapor. This makes ...Read more
AUS 40 Marine Exhaust Gas Treatment Solution
vietducjsc.vn
https://vietducjsc.vn › specialized-news › what-is-aus-4...
vietducjsc.vn
https://vietducjsc.vn › specialized-news › what-is-aus-4...
Dec 30, 2024 — AUS 40 is a 40% urea solution used in SCR systems to reduce NOx emissions from marine engines, ensuring compliance with international ...Read more
Marine Diesel Exhaust Fluid (DEF) AUS 40
Irving Oil
https://www.irvingoil.com › en-CA › lubricant › marine...
Irving Oil
https://www.irvingoil.com › en-CA › lubricant › marine...
It is a 40.0 % (AUS 40) Aqueous Urea Solution produced with high-purity urea mixed with demineralized water and was formulated to meet the specifications of ISO ...Read more