NATURAL ALUM POTASSIUM STONE POWDER - COSMOS NATURAL - salt box, 90g Authentic Alun Karawan stone is formed from potassium mineral salts, extracted from natural quarries. Alum potassium stone, a natural astringent and antibacterial deodorant. Authentic Karawan powdered Alum stone is ideal for walkers. It comes in the form of a salt shaker that allows you to sprinkle Alun salt in your shoes and thus avoid perspiration. Without aluminum hydrochloride and without ammonium. Authentic Karawan natural Alum Stone is now used as a deodorant for its properties: • Astringent, it tightens pores and therefore reduces perspiration (which must not be stopped) • Antibacterial, it neutralizes the development of bacteria that cause bad odors.