Aluminum potassium sulfate dodecahydrate (CAS 7784-24-9)

Aluminum potassium sulfate dodecahydrate, commonly known as alum or potassium alum, with the chemical formula KAl(SO4)2·12H2O and CAS number 7784-24-9, is a naturally occurring mineral that has been extensively utilized in various non-medical research fields. This compound crystallizes in an octahedral structure that includes twelve water molecules, making it a significant example in studies of crystal hydration and water molecule behavior in solid-state chemistry. In materials science, alum is employed in the purification of drinking water through a process called flocculation, where it helps in the aggregation and settling of fine particulates and bacteria from water, thus clarifying it. This chemical′s reaction mechanisms and its role in water treatment processes provide valuable insights into coagulation chemistry, which can be applied to understand larger-scale environmental processes and water management strategies. Furthermore, in the field of dyeing and textiles, aluminum potassium sulfate dodecahydrate is used to fix dyes on fabrics, ensuring color fastness. This application leverages its ability to form a bond between dye pigments and textile fibers, a process that is studied to improve and innovate fabric dyeing techniques. Additionally, its role in papermaking, where it helps in paper sizing by improving the ink resistance and strength of paper, has also been the subject of research to enhance paper quality and production efficiencies.