Potassium pyrosulfate is used in analytical chemistry; samples are fused with potassium pyrosulfate, (or a mixture of potassium pyrosulfate and potassium fluoride) to ensure complete dissolution prior to a quantitative analysis.
- Formula
- K2O7S2
- Molar mass
- 254.31 g/mol
- CAS Number
- 7790-62-7
- Density
- 2.28 g/mL at 25°C (77°F)
- Purity/Grade
- ≥97.5%Reagent
- Appearance
- Solid
- Flash point
- not applicable
- Water solubility
- ca.25.4 g/l at 20°C (68°F)
- Melting point/freezing point
- Melting point/range: 325°C (617°F)
- pH
- 1.0 - 2.0 at 25.5 g/l at 25°C (77°F)