... arouond . Twelve hydration Alum), potassium (alumina, say again: Alum, Alum, k ", potassium aluminum ", potassium Alum, is containing the potassium sulfate and vitriolic gesso bisulfate ... molecular gesso, soluble in water, soluble in ethanol. Alum sexual flavour sour se, cold, the poisonous. Reason ... astringent action etc, can be used as medicine. Alum can also used in preparation of aluminum salt, ...