CAS No.: | 557-34-6 |
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Formula: | C4h6o4zn 2(H2O) |
EINECS: | 209-170-2 |
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Item | Pharmaceutical Grade | Industry Top grade | Reagent grade |
Content% | 98.0-102.0 | 98.0-102.0 | 99.0-102.0 |
pH value of 5% solution at 25°C | 6.0-7.0 | 6.0-7.0 | 6.0-7.0 |
Water insoluble %≤ | 0.005 | 0.005 | 0.005 |
Chloride (Cl)%≤ | 0.005 | 0.01 | 0.0005 |
Sulfate (SO 4 )%≤ | 0.01 | 0.01 | 0.005 |
Iron (Fe)%≤ | 0.0005 | 0.0005 | 0.0005 |
Lead (Pb)%≤ | 0.002 | 0.005 | 0.002 |
Volatile Organic Compounds | Pass the test | ||
Arsenic (As)%≤ | 0.0003 | 0.0003 | 0.00005 |
Calcium (Ca)%≤ | 0.005 | ||
Magnesium (Mg)%≤ | 0.005 | ||
Potassium compound%≤ | 0.01 | ||
Free alkali & alkaline earth metal%≤ | 0.2 |