Dehydrated alum
Dehydrated aluminum potassium sulphate
Colorless transparent, blocky or crystalline powder, odorless and non-toxic, with a slightly sweet and astringent taste and astringency. It is readily soluble in water, and its aqueous solution is acidic. It easily loses its crystal water when heated and turns into a white powder.
Dehydrated aluminum ammonium sulphate
Used as an analytical reagent. Also used as a mordant and water softener, and in pigment manufacturing, the pharmaceutical industry, and the semiconductor industry.