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Potassium SulfateCAS No. :7778-80-5 Formula:K2SO4 MW:174.25Specifications:
Potassium Sulfate | Reagent grade A.R. | Reagent grade C.P. | Lucosamine special-purpose grade | Lucosamine low sodium grade |
Item | Spec. | Spec. | Spec. | Spec. |
Assay（K2SO4）% | ≥99.0 | ≥98.5 | ≥99.0 | ≥99.0 |
Water insoluble% | ≤0.005 | ≤0.01 | ≤0.005 | ≤0.005 |
As% | ≤0.0001 | ≤0.0005 | ≤0.0002 | ≤0.0001 |
PH(50g/L,25°C) | 5.0~8.0 | 5.0~8.0 | 5.0~8.0 | 5.0~8.0 |
Chlorides(Cl), % | ≤0.0005 | ≤0.001 | ≤0.02 | ≤0.005 |
Total nitrogen(N) % | ≤0.0005 | ≤0.001 | ≤0.0005 | ≤0.0005 |
Ca% | ≤0.01 | ≤0.02 | ≤0.01 | ≤0.01 |
Heav metal(as Pb) % | ≤0.0005 | ≤0.001 | ≤0.0005 | ≤0.0005 |
Fe% | ≤0.0002 | ≤0.0005 | ≤0.0002 | ≤0.0002 |
Na% | ≤0.03 | ≤0.1 | —— | ≤0.005 |
Fineness(40-80 meshes sieve) | —— | —— | Pass | Pass |
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Potassium Sulfate | War industry grade | Gunpowder grade | Feed grade | Technical grade |
Item | Spec. | Spec. | Spec. | Spec. |
Assay（K2SO4）% | ≥99.0 | ≥99.0 | ≥98.5 | ≥98.5 |
Water insoluble% | ≤0.01 | ≤0.02 | —— | —— |
As% | ≤0.0002 | —— | ≤0.001 | ≤0.001 |
PH(50g/L,25°C) | 6.0~8.0 | 6.0~8.0 | —— | —— |
Chlorides(Cl), % | ≤0.001 | ≤0.002 | —— | —— |
Total nitrogen(N) % | —— | —— | —— | —— |
Ca% | ≤0.02 | ≤0.03 | —— | —— |
Heav metal(as Pb) % | ≤0.001 | ≤0.001 | ≤0.002 | ≤0.002 |
Fe% | ≤0.0005 | ≤0.001 | —— | —— |
Na% | ≤0.1 | —— | —— | —— |
Mg% | ≤0.005 | ≤0.01 | —— | —— |
Fineness(120 meshes sieve) | —— | ≤5 | 40 meshes sieving rate≥95 | —— |
Potassium Sulfate