A professional reagent for modern diesel SCR systems
AUS 32 is an aqueous urea solution used as the NOx-reducing reagent in selective catalytic reduction (SCR) exhaust after-treatment. It is stored in a dedicated vehicle tank and dosed into the exhaust stream - it is not mixed with diesel fuel.
For China VI diesel applications equipped with SCR, fluid quality and clean handling are important because contamination or incorrect solution can affect dosing accuracy, deposits, sensors and catalyst performance. Always confirm the vehicle manufacturer's instructions and the supplied batch documents before use.
Designed around the needs of SCR-equipped fleets
A reliable AUS 32 supply program combines correct product quality, clean transfer practice, suitable packaging and clear documentation.
Supports NOx Reduction
Provides the reagent required by SCR systems for the exhaust after-treatment NOx reduction process.
Dedicated SCR Application
For diesel vehicles and engines equipped with a dedicated SCR dosing and catalyst system that requires AUS 32.
Quality-Control Focus
Procurement can be supported with batch documents such as COA, TDS and handling information when supplied.
Fleet & Bulk Supply
Practical for distributors, fleet depots, service centers and commercial users managing routine AUS 32 inventory.
A visual four-step SCR after-treatment process
The vehicle doses AUS 32 into the exhaust stream. Heat promotes reagent conversion, and the SCR catalyst then uses the generated ammonia in the NOx-reduction reaction.
Controlled Dosing
The dosing system meters AUS 32 into the exhaust stream according to vehicle operating conditions.
Reagent Conversion
Exhaust heat promotes conversion of the urea solution into ammonia used by the SCR reaction.
Catalyst Reaction
Ammonia reacts with NOx over the SCR catalyst as part of the vehicle's emissions-control strategy.
Cleaner Exhaust Output
When the system operates correctly, the SCR reaction converts NOx mainly into nitrogen and water.
Five checkpoints from supply to vehicle
A simple quality chain helps reduce contamination risk and keeps procurement, storage and filling responsibilities clear.
Verify Product Requirement
Confirm that the vehicle or engine manufacturer specifies AUS 32 for its SCR system.
Check Batch Documents
For specification-sensitive purchasing, review available COA / TDS and batch identification.
Keep Storage Clean
Protect sealed containers from dirt, foreign material and cross-contamination.
Use Dedicated Transfer Equipment
Use clean, dedicated pumps, hoses and nozzles intended for AUS 32 service.
Fill the Correct Tank
Fill only the dedicated AUS 32 / DEF tank and never the diesel or other fluid reservoir.
Typical use in commercial diesel applications
Use only where an SCR-equipped vehicle or engine requires AUS 32 or the equivalent specified reagent.
Heavy-duty Trucks
Long-haul, regional delivery and commercial trucks equipped with diesel SCR after-treatment.
Buses & Coaches
Urban buses, coaches and passenger fleets using SCR-equipped diesel powertrains.
Heavy Equipment
Applicable where off-road or industrial diesel equipment is designed with an AUS 32 SCR system.
Commercial Fleets
Central fleet depots and workshops that manage regular AUS 32 replenishment and bulk inventory.
Before filling, confirm these four points
Product and procurement information
This is an application overview, not a batch Certificate of Analysis. Exact test values and compliance evidence should come from the supplier's current batch documents.
Protect AUS 32 from contamination
Good storage and transfer practice helps protect product quality and supports reliable dosing-system and SCR operation.
Keep Containers Sealed
Close caps and transfer connections after use and protect the fluid from dirt, dust and foreign materials.
Use Dedicated Equipment
Use clean pumps, hoses, nozzles and storage equipment intended for AUS 32 handling.
Avoid Cross-Contamination
Do not mix AUS 32 with diesel, lubricants, coolant, tap-water residues or other chemicals.
Follow Supplier Guidance
Follow the storage, shelf-life and materials-compatibility guidance provided with the supplied product documentation.
Frequently asked questions
Is AUS 32 the same as diesel fuel?
No. AUS 32 is a separate exhaust-after-treatment reagent and must never be poured into the diesel tank.
Why does an SCR vehicle need AUS 32?
The SCR system uses the reagent to help reduce NOx emissions in the exhaust after-treatment process.
Can AUS 32 be used in every diesel vehicle?
No. Use it only when the vehicle or engine is equipped with an SCR system and the manufacturer requires AUS 32.
What should a bulk buyer request?
Request the applicable COA, TDS, SDS / handling information, packaging details, batch identification and commercial terms.
Need AUS 32 product information or a quotation?
Send your required quantity, packaging, destination and required technical documents. For specification-sensitive orders, request the current COA / TDS before final approval.
