Copper(I) sulfate

It is a white solid, in contrast to copper(II) sulfate, which is blue in hydrous form.

Compared to the commonly available reagent, copper(II) sulfate, copper(I) sulfate is unstable and not readily available.

[1] Cu2SO4 crystallizes in the orthorhombic space group Fddd.

[1] Cuprous sulfate is produced by the reaction of copper metal with sulfuric acid at 200 °C:[3] Cu2SO4 can also be synthesized by the action of dimethyl sulfate on cuprous oxide:[4] The material is stable in dry air at room temperature but decomposes rapidly in presence of moisture or upon heating.

It decomposes into copper(II) sulfate pentahydrate upon contact with water.

Copper(I) sulfate