Ammonium persulfate

Ammonium persulfate (APS) is the inorganic compound with the formula (NH₄)₂S₂O₈. It is a colourless (white) salt that is highly soluble in water, much more so than the related potassium salt. It is a strong oxidizing agent that is used as a catalyst in polymer chemistry, as an etchant, and as a cleaning and bleaching agent.