Aluminum Sulfate
Al2(SO4)3 Formula wt, anhydrous 342.14
Al2(SO4)3·18H2O Formula wt, octadecahydrate 666.41
520 [10043-01-37784-31-8] 34S289N54E aluminum sulfate
Al2(SO4)3·18H2O Formula wt, octadecahydrate 666.41
520 [10043-01-37784-31-8] 34S289N54E aluminum sulfate
DESCRIPTION
Aluminum Sulfate occurs as a white powder, as shining plates, or as crystalline fragments. It is anhydrous or contains 18 molecules of water of crystallization. Because of efflorescence, the hydrate may have a composition approximating the formula Al2(SO4)3·14H2O. One g of the hydrate dissolves in about 2 mL of water. The anhydrous approaches the same solubility, but the rate of solution is so slow that it initially appears to be relatively insoluble. The pH of a 1 : 20 aqueous solution is 2.9 or above.