| Chemistry name: | potassium acid sulfate, anhydrous |
| M Formula: | K2S2O7 |
| Properties: | |
| Colorless needles or white, crystalline powder or fused pieces. D 2.25 (25/4C), mp 325C. Soluble in water (converted to potassium bisulfate). | |
| Use: | |
| Acid flux in analysis, laboratory reagent. | |