Please tell me about the function of hexamethylphosphate triamide HPT!

Hexamethylphosphoryl triamide CAS: 680-31-9 Molecular formula: C6H18N3OP Molecular weight: 179.20 Boiling point: 235-232℃ Melting point: 7℃ Chinese name: Hexamethyl phosphoryl triamide, hexamethyl-phosphoric acid triamide, hexamethyl-phosphoric acid amide English name: Hexamethyl phosphoryl triamide, hexamethyl-Phosphoric triamide, hexamethyl-phosphoric triamid, eastman inhibitor hpt Properties: Colorless, transparent and easy-flowing liquid. Freezing point 7.20℃. Boiling point: 233℃ (235℃), 115℃ (2.0kPa), 105-107℃ (1.47kPa), 70-71℃ (0.133kPa), 66℃ (67Pa). Relative density 1.024 (25/25℃), refractive index 1.4579. Flash point 105℃. It is miscible with water and organic solvents such as ethanol, ether and benzene, but is insoluble in saturated alkanes. It can be extracted from aqueous solutions by alkyl chlorides to form complexes. Easy to absorb moisture. Production method: Obtained from the reaction of dimethylamine and alkali phosphorus oxychloride. React dimethylamine and phosphorus oxychloride in the solvent trioxyethylene, and control the temperature at 40-60°C. During the reaction, ammonia is added as an acid binding agent, which reacts with the generated hydrogen chloride to form ammonium chloride precipitate. After the reaction is completed, filter. The filtrate is treated with alkali after recovering trichlorethylene, then distilled, and the 113-118°C (2.0kPa) fraction is collected to obtain hexamethylphosphoric triamide. Industrial product hexamethylphosphoric acid triamide is a colorless or light yellow transparent liquid. The catalyst grade content is ≥99.5%, the first-grade product is ≥99.0%, and the second-grade product is ≥98.0%. Raw material consumption quota: Dimethylamine 2410kg/t, phosphorus oxychloride 1610kg/t, liquid ammonia 430kg/t. Usage: This product is a weather-resistant solvent and an excellent polar solvent for polyvinyl chloride. It has a significant effect on low-temperature resistance and anti-aging of agricultural films. ； It is a multifunctional, aprotic, high-boiling point polar solvent. It has special effects as a solvent for polymer synthesis such as polyphenylene sulfide and aromatic polyamide. It is used as a cocatalyst for propylene bulk polymerization. Adding it to ethylene-propylene rubber can improve the elastomer and oil resistance. Hexamethylphosphoric acid triamide is also used as gas chromatography stationary liquid, purple light inhibitor, rocket fuel freezing point lowering additive, chemical sterilizer, and also used in high-efficiency chemical batteries, textile printing and dyeing, synthesis * * , Extraction of earth metals, membrane material preparation, semiconductor material processing, carbon dioxide absorption and washing, insect chemical sterilizer, ultra-low volume spraying of pesticides, etc. This product is low-toxic. The oral LD50 of mice is 6000mg/kg, but this product is considered a potential carcinogen.