By itself, alum often refers to potassium alum, with the formula KAl (SO4)2·12H2O. Other alums are named after the monovalent ion, such as sodium alum and ammonium alum.

Alum, any of a group of hydrated double salts, usually consisting of aluminum sulfate, water of hydration, and the sulfate of another element. A whole series of hydrated double salts results from the hydration …

May 5, 2024 · Alum is a type of chemical compound that is commonly used in everyday and industrial applications. You'll find alum in everything from baking powder and toothpaste to cosmetics and …

Aug 21, 2025 · Discover what alum is, its many uses—from skincare to water purification—its surprising benefits, possible side effects, and how to use it safely in everyday routines.

May 28, 2025 · Alum, also known as potassium aluminum sulfate, is a naturally occurring mineral compound used across cultures and industries in various ways. The most common type of alum …

Jul 15, 2025 · Alum is a naturally occurring mineral salt with powerful astringent, antibacterial, and deodorizing effects. It is used in oral hygiene, wound care, water purification, food preservation, and …

Dec 3, 2025 · Alum represents a class of chemical compounds utilized for millennia, dating back to ancient Egyptian practices for purification and preservation. This group of chemicals is highly …

Jul 23, 2025 · What is Alum? Alum is an inorganic compound that exists as a hydrated form of double salt. Alum is composed of aluminum, water molecules, and sulphates. Alums are normally found in …

Jan 2, 2015 · A little over a hundred years ago the shortened form of alum began to be used to describe a graduate or past attendee of either gender. Although many people feel that alum is informal, it is in …

Dec 26, 2025 · Venice also needed alum for trade, since it was the point of departure for overland transportation of alum to southern Germany and its cloth-manufacturing Free Cities. 2011, Thomas …