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| UREA for SCR |
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| Short Name ▶ |
UREA |
| CAS No. ▶ |
7783-20-2 |
| UN No. ▶ |
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| Chemical Formula ▶ |
(Nh4)2so4 |
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Item
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Min/Max Values
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Result
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Urea Assay (wt%)
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98.0 min
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99.9
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Granulate size (%)
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90min(0.85~2.80mm)
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95
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Moisture (wt%)
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0.5 max
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0.4
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Nitrogen(wt%)
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46min
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46.6
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Biuret(wt%)
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0.9 max
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0.86
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Aldehydes(ppm)
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15 max
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6
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Free Ammonium (wt%)
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0.6 max
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0.01
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Insolubles (ppm)
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20 max
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4
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Fe (mg/kg)
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0.5 max
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<0.2
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Al (mg/kg)
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0.5 max
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<0.1
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Cu(mg/kg)
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0.5 max
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<0.2
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Zn(mg/kg)
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0.5 max
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<0.1
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Cr(mg/kg)
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0.5 max
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<0.2
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Ni(mg/kg)
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0.5 max
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<0.1
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Mg(mg/kg)
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0.5 max
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<0.15
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Na(mg/kg)
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0.5 max
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<0.2
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K(mg/kg)
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0.5 max
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<0.2
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Calcium(mg/kg)
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0.5 max
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<0.3
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Ash(ppm)
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100 max
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<10
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Phosphate(ppm)
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0.5 max
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<0.1
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Alkalinity as NH3(wt%)
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0.2 max
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<0.1
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Automobile urea solution is an essential additive for SCR system of diesel engine. It is selectively catalyzed and reduced by NOX products to convert it into nitrogen, oxygen and water to reducing the emission of nitrogen oxides.
As the environmental protection departments of various countries propose to further reduce the nitrogen oxides emitted by diesel engines. Domestically known as the European IV standard.
Engine manufacturers began to use SCR technology (Selective Catalytic Reduction Technology) to meet the requirements of environmental protection departments. Targeted research on reducing agents required for SCR emission after-treatment technology has led to the creation of high-quality standard AdBlue for vehicles.
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