Pyrosulfate

In chemistry, disulfate or pyrosulfate is the anion with the molecular formula S ₂O²⁻ ₇. Disulfate is the IUPAC name. It has a dichromate-like structure and can be visualised as two corner-sharing SO₄ tetrahedra, with a bridging oxygen atom. In this anion, sulfur has an oxidation state of +6.