Uses of alums.

• Alum is used in fire extinguishers to smother chemical and oil fires.
• Alum is a component of foamite.
• Styptic pencils containing aluminium sulfate are used as astringents to prevent bleeding from small sharing cuts.
• Purification of drinking water as a chemical flocculant.
• Pickling agent to help keep pickles crispness.
• Alum is used as the acidic component of some commercial backing powders.
• Alum is an ingredient in some homemade modeling compounds intended for use by children. (Play Clay )
• Alum is used in tanning.
• Alum is used to fix pigments on a surface.
• Alum is an ingredients in some hair removal waxes.
• Alum is used in skin whitener.