Potassium aluminum sulfate

Potassium aluminum sulfate, commonly known as alum, is a chemical compound used in various applications. It appears as a white, crystalline substance and is soluble in water. Alum is often used in water purification, as a food additive (such as in pickles), and in cosmetics like antiperspirants to reduce sweating. It also serves as a mordant in dyeing textiles and as an ingredient in some medicinal powders. Its ability to act as a coagulant helps remove impurities from water, making it valuable in industrial and household processes.