Crystal of potassium alum, KAl(SO 4) 2 ·12H 2 O. An alum (/ ˈ æ l ə m /) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula X Al(SO 4) 2 ·12 H 2 O, such that X is a monovalent cation such as potassium or ammonium. [1] By itself, "alum" often refers to potassium alum, with the ...

2024年5月5日 · 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.

2024年4月5日 · Today, alum is primarily used only as an additive to food, cosmetics, medicine, and more. It is a readily available ingredient and a fantastic product. And the best part? It has various health benefits and uses and it does not cost much! Read on to …

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.

2024年11月29日 · 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 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+).

2015年1月2日 · The 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 is a class of chemical compounds known as double sulfates that typically contain aluminum, a monovalent cation (such as potassium, sodium, or ammonium), and another trivalent metal (like iron or chromium).

2023年8月9日 · Alum is an inorganic compound consisting of water molecules, aluminum, other metals besides aluminum, and sulfates. Alum, in its hydrated state, is classified as a double salt. There are various forms of alum, including Potash Alum, Soda Alum, Ammonium Alum, and …