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Molecular formula: K2SO4
Molecular weight: 174.26
CAS NO: 7778-80-5
[Character] Colorless or white crystal or powder. It tastes bitter and salty. The density of 2.662. Melting point 1069℃, boiling point 1689℃. Soluble in water, insoluble in ethanol, acetone and carbon disulfide.
[To use] Used as analytical reagents, such as reference reagents, kai-type nitrogen determination catalysts. It is also used in the preparation of potassium salts and the pharmaceutical industry. Used as a medicine (laxative). It is also used as biofertilizer, and is used to make alum, glass and potash.
[Standard] The impurity content is calculated by the highest content
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Specification
Name of index
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Analytically pure-AR |
Chemically pure-CP |
| Content (K2SO4) |
≥99.0 |
≥98.5 |
| PH (50g/L,25℃) |
5.0~8.0 |
5.0~8.0 |
| Clarity test |
qualified |
qualified |
| Water insolubles |
≤0.005 |
≤0.01 |
| Chloride(Cl) |
≤0.0005 |
≤0.001 |
| Total nitrogen(N) |
≤0.0005 |
≤0.001 |
| Sodium (Na) |
≤0.03 |
≤0.1 |
| Calcium(Ca) |
≤0.01 |
≤0.02 |
| Ferrum(Fe) |
≤0.0002 |
≤0.0005 |
| Arsenic(As) |
≤0.0001 |
≤0.0005 |
| Heavy metal (Pb) |
≤0.0005 |
≤0.001 |
[Packing] Plastic inside and outside woven, kraft paper bag or cardboard bucket, net weight 25kg.
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