Tetrakis Phosphonium Chloride
THPC
- CAS
- 124-64-1
- EC
- 204-707-7
- Sectors
- Textiles, Leather & Paper, Plastics & Polymers, Water & Wastewater Treatment
Tetrakis Phosphonium Chloride (CAS 124-64-1), also known as THPC, is a water-soluble organophosphorus salt supplied as a clear light pink or yellow-green solution, used as a flame retardant for textiles, plastics and paper and as a precursor to fire-retardant materials. Density 1.341 g/mL at 25°C, highly soluble in water, used as organophosphorus salt; decomposes on heating releasing POx, HCl, bis(chloromethyl)ether; formed from phosphine, formaldehyde, HCl.
Typical Properties
| Molecular formula | C4H12O4P.Cl |
|---|---|
| Molecular weight | 190.56 g/mol |
| Appearance | Clear light pink or yellow-green solution |
| Form | Solution |
| Color | Clear light pink or yellow-green |
| Melting point | 154 °C |
| Boiling point | 115°C/760mmHg |
| Density | 1.341 g/cm³ |
| Water solubility | >=10 g/100 mL at 20 °C |
| GHS signal word | Danger · Corrosive, Acute toxicity, Irritant / harmful, Health hazard, Environmental hazard |
| HS code | 29319019 |
| 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.
Tetrakis Phosphonium Chloride
Applications
Used as flame retardant for textiles, plastics, paper; precursor to fire-retardant materials; reducing agent/stabilizing ligand for gold nanoparticles synthesis; cross-linker for 3D cell encapsulation in hydrogels; in disinfection of cooling towers; antioxidant for oxygen scavenging in polymer gel dosimeters; in leather tanning processes.
Safety & Risks
Corrosive, causes burns/irritation to skin/eyes/respiratory; releases hazardous gases on decomposition; reacts vigorously with oxidizers/alkalis; potential carcinogenic effects from byproducts. Chronic/acute hazards; incompatible with oxidizers; use PPE, ventilate; health/environmental risks noted in aquatic systems.
Packaging
Supplied as 80% aqueous solution in 200kg plastic drums or 1L bottles for lab use, ensuring compatibility with corrosives.