What is alum ? Give its uses ?
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Potassium alum is commonly used in water purification, leather tanning, dyeing, fireproof textiles, and baking powder as E number E522. It also has cosmetic uses as a deodorant, as an aftershave treatment and as a styptic for minor bleeding from shaving.
Uses of Alum
purification of drinking water as a chemical flocculant.
in styptic pencil to stop bleeding from minor cuts.
the adjuvant in vaccines ( a chemical that enhances the immune response)
deodorant "rock"
pickling agent to help keep pickles crisp.
flame retardant.
the acidic component of some types of baking powder.
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