CAS | 127-08-2 | INS | 261(E261 i) | ||
Molecular formula | C2H3KO | ||||
Properties |
Colorless or white crystalline powder.Slightly acid taste, easy deliquescence. |
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Quality Specifications |
Standard Item |
BP2012 | ACS Grade | USP35 | EP7.0 |
Content | ≥99.0% | ≥99.0% |
99.0% ~ 100.5% (Dry basis) |
99.0% ~ 101.0% (Dry basis) |
|
pH test |
7.5 - 9.0 (1 in 20 soln) |
6.5-9.0 (5% solution at 25.0℃) |
7.5 ~ 8.5 (5% Solution) |
7.5-9.0 | |
Loss on drying |
≤8.0% (150℃, 2 h) |
----------- | ≤ 1.0% | ≤ 3% | |
Heavy Metals |
≤ 2 mg/kg | ≤5ppm | ≤ 0.002% | ≤4ppm | |
Sodium | ----------- | ≤0.03% | ----------- | ≤0.5% | |
Insoluble matter |
----------- | ≤0.005% | ----------- | ----------- | |
Chloride (Cl) |
----------- | ≤0.003% | ----------- | ≤200ppm | |
Phosphate (PO4) |
----------- | ≤0.001% | ----------- | ----------- | |
Sulfate (SO4) |
----------- | ≤0.002% | ----------- | ≤200ppm | |
Iron(Fe) | ----------- | ≤5ppm | ----------- | ≤20ppm | |
Calcium(Ca) | ----------- | ≤0.005% | ----------- | ----------- | |
Magnesium (Mg) |
----------- | ≤0.002% | ----------- | ----------- | |
Reducing substances |
----------- | ----------- | ----------- | passed test | |
Aluminum salts |
----------- | ----------- | ----------- | ≤1ppm |