Alum Definition & Meaning - Merriam-Webster
WebThe meaning of ALUM is a potassium aluminum sulfate KAl (SO4)2·12H2O or an ammonium aluminum sulfate NH4Al (SO4)2·12H2O used especially for its astringent and styptic properties. How to use alum in a sentence.
Alum - Wikipedia
WebAn alum ( / ˈæləm /) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula XAl (SO. 4) 2·12 H. 2O, such that X is a monovalent cation such as potassium or ammonium. [1] . By itself, "alum" often refers to potassium alum, with the formula KAl (SO. 4) 2·12 H. 2O.
What Is Alum and How Is It Used? - ThoughtCo
WebDec 2, 2022 · Alum refers to a collection of chemical compounds that are hydrated sulfate salts of aluminum and usually one other metal. Common forms of alum include hydrated potassium aluminum sulfate, ammonium aluminum sulfate, and sodium aluminum sulfate. The different compounds have different functions.
Alum | Definition, Uses, Formula, & Facts | Britannica
Webalum, 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 of the sulfate of a singly charged cation (e.g., K +) and the sulfate of any one of a number of triply charged cations (e.g., Al 3+ ).
Alum for skin: Uses, benefits, and safety - Medical News Today
WebDec 21, 2023 · How to use. Side effects. Summary. Alum is a compound that contains aluminum. In cosmetics, alum usually refers to potassium alum, which has astringent and antibacterial properties. However, it...
What is Alum | About Alum and Alum Substitution | McCormick
Webarticles. WHAT IS ALUM? 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 found in kitchen pantries is potassium alum.
Alum - Properties, Uses of Alum, Types, Water Treatment, Fitkari
WebAlum is an inorganic chemical compound that is generally made up of water molecules, aluminium or other metals and sulphates. Alum is basically a hydrated double sulphate salt of aluminium. The general chemical formula for alum is XAl(SO 4) 2 ·12H 2 O. Alums can occur as minerals. For example, alunite and leucite.
ALUM | English meaning - Cambridge Dictionary
Webalum noun [C] (past member) short for alumnus : someone who studied at a particular school, college, or university: Paul, although an Englishman, is an Arizona State alum. …
ALUM | definition in the Cambridge English Dictionary
Webalum noun [C] (past member) short for alumnus : someone who studied at a particular school, college, or university: Paul, although an Englishman, is an Arizona State alum. …
Alum - definition of alum by The Free Dictionary
WebAny of various crystalline salts in which a metal such as aluminum or chromium is combined with another metal such as potassium or sodium, especially aluminum potassium sulfate. Alum is widely used in industry as a hardener and purifier, and in medicine to induce vomiting and stop bleeding.
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