AUS 40 (Aqueous Urea Solution 40%) is a ready-to-use solution containing 40% high-purity urea dissolved in demineralized water. When injected into the Selective Catalytic Reduction (SCR) system, AUS 40 reacts with nitrogen oxides present in exhaust gases, converting harmful pollutants into harmless nitrogen and water vapor before they are released into the atmosphere. This technology plays a critical role in helping marine operators meet global environmental regulations while improving overall sustainability.
BIOAR AUS 40 is designed to reduce NOx emissions in marine diesel engines equipped with SCR technology. Manufactured with high-purity automotive-grade urea and ultra-purified demineralized water, it delivers consistent quality, reliable performance, and optimal SCR system protection. With a production facility strategically located near major Brazilian ports, BIOAR ensures fast, efficient, and dependable supply for the marine industry.

Manufactured with premium-grade urea and ultra-pure demineralized water to ensure maximum SCR efficiency while protecting critical system components.

Backed by a fleet of 94 trucks, our efficient logistics network ensures dependable deliveries, helping keep your operations running without interruption.

Strict quality control throughout the manufacturing process delivers consistent product quality, supporting long-term SCR reliability and compliance with emission standards.
BIOAR supports marine operators in lowering their environmental footprint through premium emission-control solutions that contribute to cleaner air and responsible shipping practices.
BIOAR AUS 40 is manufactured to meet the quality requirements expected for marine SCR applications, supporting compliance with internationally recognized standards such as ISO 18611.
No. AUS 40 is specifically formulated for marine and certain industrial SCR systems. Always follow the equipment manufacturer's recommendations.
BIOAR is ready to support your operation with premium-quality AUS 40 and dependable service.
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