| Definition | |
| Synonyms | Potassium bisulphate, potassium acid sulphate |
| Chemical name | Potassium hydrogen sulphate |
| Chemical formula | KHSO4 |
| Molecular weight | 136,17 |
| Assay | Content not less than 99 % |
| Melting point | 197 oC |
| Description | White deliquescent crystals, pieces or granules |
| Identification | |
A.Positive test for potassium | |
B.Solubility | Freely soluble in water, insoluble in ethanol |
| Purity | |
| Selenium | Not more than 30 mg/kg |
| Arsenic | Not more than 3 mg/kg |
| Lead | Not more than 5 mg/kg |
| Mercury | Not more than 1 mg/kg |