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Related to aluminum sulfate: aluminum potassium sulfate
aluminum sulfate[ə′lüm·ə·nəm ′səl‚fāt]
Al2(SO4)3·18H2O A colorless salt in the form of monoclinic crystals that decompose in heat and are soluble in water; used in papermaking, water purification, and tanning, and as a mordant in dyeing. Also known as alum.