Overview
Potassium peroxymonosulfate is an inorganic compound that serves as a convenient source of active oxygen. As a triple salt (2KHSO5·KHSO4·K2SO4), it offers stability in solid form while maintaining strong oxidizing properties when dissolved. The compound was first developed in the 1970s and has since become a versatile oxidant in both industrial and consumer applications. Its commercial form, often marketed as Oxone, combines stability with effectiveness, making it preferable to many liquid oxidizers. The compound decomposes in water to yield oxygen and sulfate radicals, which are responsible for its oxidizing and disinfecting capabilities.
Physical and Chemical Properties
As a white, crystalline powder, potassium peroxymonosulfate is odorless and stable when dry. The compound's density ranges between 1.12-1.20 g/cm³, and it decomposes rather than melts when heated. Its water solubility enables easy application in aqueous systems, where it dissociates to form reactive oxygen species. The oxidation potential of potassium peroxymonosulfate is pH-dependent, being most effective in acidic conditions (pH 2-4). It demonstrates excellent stability in storage when kept dry, with typical shelf lives of 1-2 years. The compound is incompatible with reducing agents, organic materials, and certain metals, which can catalyze its decomposition.
Main Applications
In water treatment, potassium peroxymonosulfate serves as both a disinfectant and oxidizer for contaminants like iron, manganese, and organic compounds. Municipal water systems and pool maintenance frequently utilize this compound for its broad-spectrum microbial control and algae prevention capabilities. The chemical industry employs it as a selective oxidant in organic synthesis, particularly for converting sulfides to sulfoxides and cleaving double bonds. Additional applications include pulp and paper bleaching, circuit board etching, and as an alternative to chlorine-based disinfectants in food processing environments.
Safety and Storage
As a strong oxidizer, potassium peroxymonosulfate requires careful handling to prevent reactions with incompatible materials. Workers should wear protective gloves, eye protection, and dust masks when handling the powder. Spills should be cleaned immediately with plenty of water to prevent concentration. Storage recommendations include keeping containers tightly sealed in cool, dry areas separate from organic compounds and reducing agents. The compound should not be mixed with acids, alkalis, or ammonium salts without proper safety evaluation. Firefighters should use copious amounts of water to extinguish fires involving this material, as it can intensify combustion of organic matter.
B2B Procurement Guide
When sourcing potassium peroxymonosulfate, buyers should specify the required active oxygen content (typically 42-46%) and verify certificates of analysis. Industrial-grade material often contains stabilizers to enhance shelf life, which may affect specific applications. Packaging options range from 25kg bags to bulk containers, with moisture-resistant liners being essential. Lead times can vary depending on production schedules, so buyers should plan procurement accordingly. For international shipments, proper classification as an oxidizer (UN 3260) must be confirmed with the supplier to ensure compliant transportation.
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