Applications

• as a mordant in hand dyeing
• making crystals
• is an astringent/styptic and antiseptic
• a natural deodorant by inhibiting the growth of the bacteria responsible for body odor
• General Laboratory Reagent

General

Potassium alum, potash alum or tawas is the potassium double sulfate of aluminium.

It is commonly found in its dodecahydrate form as KAl(SO4)2·12(H2O).

Alum is the common name for this chemical compound, given the nomenclature of potassium aluminum sulfate dodecahydrate.

It is commonly used in water purification, leather tanning, dyeing, 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.

Specification

• Minimum Assay: >99.5%
• Molecular Formula: AlK(S04)2.12H20
• Molecular Weight: 474.38 g/mol
• Melting Point: 92 C
• Water: <4.5%
• Chloride: <0.01%
• Iron: <100ppm
• Aluminium: 5-6%

Hazards

Hazard Phrases: Not considered harmful under normal laboratory conditions

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