What is alum meaning?

Alum is a chemical compound that is widely used in various industrial processes as well as in cosmetics and medicine. The term "alum" generally refers to potassium aluminum sulfate, which is a crystalline salt that has astringent properties and is commonly used as a deodorant, a wound healer, and a water purifier. It is also used in dyes, tanning, and bleaching agents. There are various types of alums such as sodium alum, ammonium alum, and chrome alum, which have different applications. Alum has been used since ancient times for its medicinal and cosmetic properties and is still widely used today.