The introduction of BS-VI emission standards in India has transformed the commercial vehicle sector. To comply with strict nitrogen oxide (NOx) limits, modern diesel trucks, buses, and diesel SUVs use Selective Catalytic Reduction (SCR) exhaust systems. These systems rely on high-purity **Diesel Exhaust Fluid (DEF)** to convert harmful exhaust gases into harmless nitrogen and water vapor.
1. The Chemistry Behind DEF
Diesel Exhaust Fluid is not fuel, nor is it added to the diesel fuel tank. It is carried in a dedicated tank and injected directly into the exhaust stream before the catalytic converter. The chemical composition of DEF is defined by strict international standards:
- 32.5% High-Purity Automotive-Grade Urea: The optimal concentration required to ensure efficient conversion of NOx at exhaust gas operating temperatures.
- 67.5% Demineralized Water: Multi-stage reverse osmosis water free from mineral impurities that could damage SCR catalysts.
2. The Critical Importance of ISO 22241 Certification
Using cheap or low-quality DEF is a major cause of SCR failures. Common mineral impurities like sodium, potassium, calcium, iron, or zinc can permanently poison the catalyst active sites, resulting in:
- Blocked DEF dosing injector sprays.
- Catalytic converter poisoning, which leads to high emission warning codes.
- The engine computer entering a restricted 'limp-home' speed mode, resulting in costly downtime.
Pure Assurance
AGREX DEF is produced under clean-room conditions at our plant in GIDC Matar, Kheda, complying with all parameters of ISO 22241. Every batch undergoes laboratory testing for trace metals and density checks before packaging, keeping your commercial fleet running efficiently and compliant with BS-VI emission limits.
Interested in Partnering or Bulk Blending?
MniGlobal provides custom formulation services, private labeling, and toll blending matching global API and OEM standards at our Kheda plant.