AUS-40 is Diesel Exhaust Fluid (DEF) commonly used in ships to reduce Nitrogen Oxide (NOx) emissions. It is employed not only in marine vessels but also in other diesel engine exhaust systems. The solution involves injecting Marine Urea into the diesel engine exhaust systems, where it reacts with nitrogen oxide gas emissions. This chemical process effectively converts harmful emissions into water vapor and Nitrogen. Typically, AUS40 has 40% urea content in the produced DEF.
| Product specification | Monomark standard |
| Mass fraction of urea, % | 39.5-40.5 |
| Density at 20 °C, kg/m3 | 1108.0-1116.0 |
| Refractive index at 20 °C | 1.3937-1.3954 |
| Alkalinity as mass fraction of NH3, %, max | 0.3 |
| Mass fraction of biuret, %, max | 0.5 |
| Mass concentration of aldehydes, mg/kg, max | 6 |
| Infusible particles, mg/kg, max | 25 |
| Mass concentration of phosphates, mg/kg, max | 0.6 |
| Mass concentration of aluminium, mg/kg, max | 0.5 |
| Mass concentration of calcium, mg/kg, max | 0.5 |
| Mass concentration of iron, mg/kg, max | 0.5 |
| Mass concentration of copper, mg/kg, max | 0.3 |
| Mass concentration of zinc, mg/kg, max | 0.2 |
| Mass concentration of chromium, mg/kg, max | 0.3 |
| Mass concentration of nickel, mg/kg, max | 0.3 |
| Mass concentration of magnesium, mg/kg, max | 0.5 |
| Mass concentration of sodium, mg/kg, max | 0.5 |
| Mass concentration of potassium, mg/kg, max | 0.5 |
AUS-32 is specifically designed Diesel Exhaust fluid for the diesel-powered vehicles equipped with Selective Catalytic Reduction (SCR) systems. The solution conforms to BS IV and BS VI emission norms. Its primary purpose is to control Nitrous Oxides (NOX) emissions, thus reducing air pollution caused by diesel engines. The solution is a clear, non-toxic, non-polluting, and non-hazardous blend of pure automotive-grade urea and demineralized water. The urea content in the solution is meticulously controlled within the range of 31.8% to 33.2% through an automated blending process.
| Min | Max | ||
|---|---|---|---|
| Urea Content | 31.8 | 33.2 | % by weight |
| Density at 20°C | 1.0870 | 1.0930 | g/cm3 |
| Refracting Index at 20°C | 1.3814 | 1.3843 | |
| Alkalinity as NH3 | 0.2 | % | |
| Biuret | 0.3 | % | |
| Aldehyde | 5 | mg/kg | |
| Insolubles | 20 | mg/kg | |
| Phosphate (PO4) | 0.5 | mg/kg | |
| Calcium | 0.5 | mg/kg | |
| Iron | 0.5 | mg/kg | |
| Copper | 0.2 | mg/kg | |
| Zinc | 0.2 | mg/kg | |
| Chromium | 0.2 | mg/kg | |
| Nickel | 0.2 | mg/kg | |
| Aluminium | 0.5 | mg/kg | |
| Magnesium | 0.5 | mg/kg | |
| Sodium | 0.5 | mg/kg | |
| Potassium | 0.5 | mg/kg |