Used as a strong oxidizing agent in polymerization reactions, especially in the production of polystyrene and other synthetic polymers. Acts as an initiator for free radical reactions in emulsion and suspension polymerization processes. Commonly applied in etching copper in printed circuit board manufacturing due to its ability to oxidize metals. Utilized in hair bleaching and cosmetic formulations as a bleaching agent. Employed in soil analysis and environmental testing to digest organic matter and release nutrients for measurement. Also found in cleaning and stripping solutions for metals and industrial equipment.