Copper (II) sulfate exothermically dissolves in water to give the aquo complex [Cu(H2O)6]2+, which has octahedral molecular geometry and is paramagnetic. Other names for copper(II) sulfate are "blue vitriol" and "bluestone".
C 2703 (OTTO) Cupric sulphate, anhydrous 98% Cas no 7758-98-7 - used as a dehydrating agent for forming and manipulating acetal groups.The hydrated salt can be intimately mingled with potassium permanganate to give an oxidant for the conversion of primary alcohols.