Potassium monopersulfate (CAS No. 70693‑62‑8) is a white crystalline oxidizing triple salt (formula: 2KHSO₅·KHSO₄·K₂SO₄; mol. weight ~614.74 g/mol). It provides ≥ 42% active KHSO₅, is water-soluble, acidic (pH ~2–3), hygroscopic, and widely used as a stable, high‑purity oxidant in industrial and laboratory settings.