Potassium peroxochromate, potassium tetraperoxochromate(V), or simply potassium perchromate, is an inorganic compound having the chemical formula K3[Cr(O2)4].

It is a red-brown paramagnetic solid.

It is the potassium salt of tetraperoxochromate(V), one of the few examples of chromium in the +5 oxidation state and one of the rare examples of a complex stabilized only by peroxide ligands.

[2] This compound is used as a source of singlet oxygen.

[1] Potassium peroxochromate is prepared by treating potassium chromate with hydrogen peroxide at 0 °C: The intermediate tetraperoxochromate(VI) is reduced by hydrogen peroxide, forming tetraperoxochromate(V):[3][4] Thus, the overall reaction is: The compound decomposes spontaneously at higher temperatures.