It is present as a component of a triple salt including potassium monopersulfate, potassium sulfate and potassium bisulfate with the formula 2KHSO5•KHSO4•K2SO4. The oxidation potential of this compound is derived from its peracid chemistry.

Potassium peroxymonosulfate can be used in swimming pools to keep the water clear, thus allowing chlorine in pools to work to sanitize the water rather than clarify the water, resulting in less chlorine needed to keep pools clean.