Diesel Exhaust Fluid (DEF) is a non-toxic, high purity solution comprised of 32.5% urea and 67.5% de-ionized
water for specific use in Selective Catalytic Reduction (SCR) systems. Using this fluid in diesel-powered vehicles, such as
trucks, buses, and tractors, helps to reduce the amount of nitrogen oxides (NOx) emitted into the air by 90%. It is not a fuel additive and must be filled into the dedicated Diesel Exhaust Fluid tank on your diesel vehicle.
| SCR/DEF grade urea, automotive grade urea high purity |
| adblue grade urea |
| Nitrogen: 46.6% |
| Moisture: 0.35% |
| Biuret:0.7% |
| Particle size(0.85-2.80mm): 94% |
| Urea 46% or Urea N 46% or Urea prilled or Industry Urea |
| CAS:57-13-6 |
| Molecular Formula:CH4N2Ol |
| Molecular Weight:60.06 |
| Melting point:132-135C |
| Relative density:1.335g/ml at 25C(lit) |
How Diesel Exhaust Fluid Works
When injected into the exhaust stream with a specialized dosing module, DEF vaporizes, leaving amonia molecules en route to the catalytic converter; once there, it converts NOx molecules into harmless nitrogen and water vapor-making for cleaner emissions. Making sure you do not run out of DEF in an SCR equipped truck is simple – watch the DEF gauge, which is part of the diesel fuel gauge, for when it is time to refill. DEF is stored in a dedicated tank next to the fuel tank on the driver’s side. The tanks range in size from 6 to 23 gallons depending on the truck’s application.
Automotive Grade Urea
Automotive Grade Urea is a special, uncoated version of highest purity. It is a main component of urea solutions like Diesel Exhaust Fluid or AUS40/45 which are used within SCR-systems for the reason of NOx reduction. It is the only type of Urea that meets the ISO 22241 specification and the only suitable Urea for the production of DEF/AUS32/ARLA32 solutions. For meeting the ISO 22241 the Urea needs to be of highest purity/quality.
Specification
| According to ISO22241 standard | ||
| Test Items | Unit | specification |
| T-nitrogen | % | >46 |
| moisture | % | <0.5 |
| Biuret | % | <0.87 |
| alkalinity(NH3) | % | <0.05 |
| aldehyde | mg/kg | <15.4 |
| insoluble matter | mg/kg | <61.5 |
| PO4 | mg/kg | <1.5 |
| Ca | mg/kg | <1.5 |
| Fe | mg/kg | <1.5 |
| Cu | mg/kg | <0.6 |
| Zn | mg/kg | <0.6 |
| Ni | mg/kg | <0.6 |
| Cr | mg/kg | <0.6 |
| Mg | mg/kg | <1.5 |
| Na | mg/kg | <1.5 |
| K | mg/kg | <1.5 |
| Al | mg/kg | <1.5 |
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