Iron(II) perchlorate

Iron(II) perchlorate is the inorganic compound with the formula Fe(ClO4)2*6H2O. A green, water-soluble solid, it is produced by the reaction of iron metal with dilute perchloric acid followed by evaporation of the solution:
 * Fe + 2 HClO4  +  6 H2O -> Fe(ClO4)2*6H2O  +  H2

In solution, iron(II) perchlorate slowly oxidizes in air to iron(III) oxyhydroxide.

The hexahydrate consists of discreet hexaaquoiron(II) dications and perchlorate anions. It crystallizes with an orthorhombic structure. It has minor phase transitions at 245 and 336 K.

Uses
In organic chemistry, iron(II) perchlorate can be used as a source of ferrous ions for the Fenton oxidation.