Alum
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
(Ammonium Alum, Aluminum Ammonium Sulfate), AlNH4(SO4)2· 12H2O 453.33 CAS RN®: 7784-26-1.—Large, colorless crystals or crystalline fragments or a white powder. Soluble in 7 parts of water and in about 0.5 part of boiling water; insoluble in alcohol. Use ACS reagent grade.
