Potassium Aluminum Sulphate
Potassium alum is commonly used in water purification, leather tanning, dyeing,[6] fireproof textiles, and baking powder. It also has cosmetic uses as a deodorant, as an aftershave treatment and as a styptic for minor bleeding from shaving.
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Molecular Formula
KAl(SO4)2·12H2O
Appearance and Properties
Potassium alum crystallizes in regular octahedra with flattened corners and is very soluble in water. The solution is slightly acidic and is astringent to the taste. When heated to nearly a red heat, it gives a porous, friable mass, which is known as "burnt alum". It fuses at 92 °C (198 °F) in its own water of crystallization.
Uses
Potassium alum is used in medicine mainly as an astringent (or styptic) and antiseptic.
| ITEM | SPECIFICATIONS |
| Appearance | White powder |
| Purity % | 99.2 min |
| Insoluble mater in water % | 0.20 max |
| Water % | 1.0 max |
| Fe % | 0.02 max |
| As % | 0.0002 max |
| Heavy metal (as Pb)% | 0.002 max |
