ALUM POWDER 250 GM
Alum. The name alum was originally coined to denote the double sulphate of aluminium and potassium, which crystallized in the shape of octahedra with 24 molecules of water of crystallization. This salt is also called potash alum, Al2K2(SO4)4. It contains about 36% aluminium sulphate.
|Model:||GH - 6014|
An alum (/ˈæləm/) is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula XAl(SO
2O, where X is a monovalent cation such as potassium or ammonium. By itself, "alum" often refers to potassium alum, with the formula KAl(SO
2O. Other alums are named after the monovalent ion, such as sodium alum and ammonium alum.
The name "alum" is also used, more generally, for salts with the same formula and structure, except that aluminium is replaced by another trivalent metal ion like chromium(III), and/or sulfur is replaced by another chalcogen like selenium. The most common of these analogs is chrome alum KCr(SO
In most industries, the name "alum" (or "papermaker's alum") is used to refer to aluminium sulfate Al
2O, which is used for most industrial flocculation. In medicine, "alum" may also refer to aluminium hydroxide gel used as a vaccine adjuvant.