| Properties | Colorless or white crystalline powder. Slightly soluble in water, easily soluble in dilute mineral acids, alkaline solutions and borax solutions, insoluble in acetic acid or ethyl alcohol | |
| Molecular formula | C4H5KO6 | |
| Structural formula |  |
|
| Molecular weight | 188.18 | |
| Quality index |
Content (C4H5KO6 dry basis ) | 99.0%~101.0% |
| Specific rotation | +32.5º ～+35.5º | |
| Clarity test | Pass the test | |
| Drying loss | ≤0.5% | |
| Arsenic | ≤3mg/kg | |
| Lead | ≤2mg/kg | |
| Sulfate (SO4) | ≤0.019% | |
| Ammonium salt test | Pass the test | |
| Main functions amd uses |
For volumetric analysis, buffer agent, reducing agent and swelling agent in food industry, and etc. | |
| Packing | 25KG cardboard drum or at the request of clients. | |
| Storage | Keep in dry, cool and shading place. | |
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