Potassium Persulfate
Potassium Peroxydisulfate, Potassium Perdisulfate
- CAS
- 7727-21-1
- EC
- 231-781-8
- Sectors
- Plastics & Polymers, Rubber & Elastomers, Water & Wastewater Treatment
Potassium Persulfate (CAS 7727-21-1) is a white, odorless crystalline peroxydisulfate salt that decomposes on heating or in solution to release active oxygen species, and it is used as a polymerization initiator for latex, rubber and acrylic resins and in wastewater treatment as an oxidizing reagent.
Typical Properties
| Molecular formula | H2O8S2.2K |
|---|---|
| Molecular weight | 270.32 g/mol |
| Appearance | Potassium persulfate is a colorless or white, odorless crystalline material. |
| Form | Solid |
| Color | White |
| Odor | Odorless |
| Melting point | 14 °C |
| Boiling point | 141 °C |
| Density | 2.477 g/cm³ |
| Water solubility | 5 g/100 mL (20 °C) |
| pH | 3.2 (50g/l, H2O, 20°C) |
| GHS signal word | Danger · Oxidizing, Irritant / harmful, Health hazard |
| HS code | 28334000 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Potassium Persulfate
Applications
Used as a polymerization initiator for latex, rubber, and acrylic resins. It also finds application in hair bleaching formulations, PCB etching, and wastewater treatment. In analytical chemistry, it serves as a powerful oxidizing reagent.
Safety & Risks
Strong oxidizer and irritant; avoid contact with organic matter and moisture. Handle with gloves, goggles, and proper ventilation.
Packaging
Supplied in 25 kg PE-lined paper bags or 1,000 kg big bags. Store in a cool, dry, and well-ventilated area, isolated from combustible substances.