Are AUS 32 and AdBlue the Same? A Clear Explanation for Drivers and Transport Businesses

1. What Is AUS 32? – The Technical Term in the ISO 22241 Standard

AUS 32 stands for Aqueous Urea Solution 32.5%, which is a solution consisting of 32.5% high-purity urea and 67.5% deionized water. This exact formula is the only one approved by vehicle manufacturers, engine producers, and international environmental organizations for use in SCR (Selective Catalytic Reduction) systems.

The term AUS 32 appears in the ISO 22241 standard, a strict technical standard that regulates the quality of exhaust treatment fluids. ISO 22241 defines detailed requirements regarding:

• Chemical composition

• Purity level

• Manufacturing processes

• Packaging standards

• Transportation and storage conditions

Thanks to these strict requirements, fluids meeting the AUS 32 standard are guaranteed to be safe, stable, and fully compatible with SCR systems used in Euro 4, Euro 5, and Euro 6 vehicles.

From a technical perspective, AUS 32 is considered the scientific or engineering term, distinguishing certified emission treatment fluid from industrial urea or other solutions that are not suitable for vehicles.

2. What Is AdBlue? – A Registered Commercial Trademark

AdBlue is a registered trademark owned by the VDA (German Association of the Automotive Industry). Any product marketed under the name AdBlue must fully comply with the AUS 32 specifications defined in ISO 22241 and must be licensed to use the trademark.

In other words, AdBlue is the commercial name used to describe AUS 32 compliant fluid.

European vehicle manufacturers and many diesel engine producers often use the term “AdBlue” in technical documentation, making it easier for drivers and transport companies to identify the correct fluid for their vehicles.

3. What Is the Difference Between AUS 32 and AdBlue?

From a chemical and functional standpoint, AUS 32 and AdBlue are identical. Both have:

• The same chemical formula

• The same 32.5% urea concentration

• The same purity requirements

• The same manufacturing standards

The only difference is that:

• AUS 32 is the technical term used in international standards.

• AdBlue is the commercial trademark used in the market.

Therefore, when selecting an exhaust treatment fluid, the most important factor is not the name, but purity, certification, and a reliable supplier.

4. AdBlue VID AUS32 – ISO 22241 Certified Product Distributed by Viet Duc Joint Stock Company

• AdBlue VID AUS32 is a premium product developed specifically for diesel vehicles equipped with SCR systems. Every production batch is strictly controlled to meet the AUS 32 specifications defined in ISO 22241, ensuring maximum purity and stability.
• Viet Duc Joint Stock Company distributes AdBlue VID AUS32 with a strong commitment to quality. The entire process—from raw material selection and blending to packaging—is carefully inspected.
• The product helps the SCR system operate efficiently, prevents deposits, protects injectors, avoids catalyst damage, and supports effective NOx emission reduction in compliance with Euro standards.
• It is available in multiple packaging options, including:

• 10L – 20L cans

• 200L drums

• 1000L IBC tanks

These options make the product suitable for individual drivers, garages, and large transport companies.

5. Why Should Drivers and Transport Companies Use Standard AUS 32 / AdBlue?

The SCR system is highly sensitive to impurities. Industrial urea or diluted solutions can easily cause:

• Deposit formation

• Injector clogging

• Reduced catalytic efficiency

• Vehicle malfunction or failure to start

Using AUS 32 / AdBlue that meets ISO 22241 standards is therefore a mandatory requirement recommended by vehicle manufacturers.

Certified fluid ensures the effective conversion of NOx emissions, helps vehicles remain compliant with emission regulations, and extends the lifespan of the SCR system, which is a component with very high replacement costs.

For transport companies, following these standards also helps reduce maintenance costs and protect business reputation.

Using certified products such as AdBlue VID AUS32 distributed by Viet Duc Joint Stock Company ensures maximum safety, performance, and long-term reliability for vehicle fleets.