Triphenyl Phosphate (TPP) is a widely used organophosphorus compound, mainly used as a flame retardant, plasticizer and lubricant. The following is a detailed introduction to TPP:
Basic Information:
- Chemical formula: C₁₈H₁₅O₄P
- Molecular weight: 326.29 g/mol
- CAS number: 115-86-6
Physical properties:
- Appearance: White crystalline solid or colorless liquid (depending on temperature)
- Melting point: 48-50°C
- Boiling point: 245°C (473°F) at 11 mmHg
- Density: 1.185 g/cm³ (25°C)
- Flash point: 220°C (428°F)
- Solubility:
Soluble in organic solvents (such as ethanol, ether, acetone, benzene, etc.)
Insoluble in water
Chemical properties:
- Stability: Stable at room temperature, but may hydrolyze at high temperature or under strong acid/base conditions.
- Reactivity: Can react with strong oxidants, avoid contact with strong acids and bases.
Main Applications:
- Flame retardant:
Used in plastics, rubber, textiles and electronic devices to improve the flame retardant properties of materials.
Commonly found in materials such as polycarbonate (PC), polystyrene (PS) and polyurethane (PU). - Plasticizer:
Used in PVC and other polymers to improve the flexibility, processing performance and durability of materials. - Lubricant:
Used as an additive in hydraulic oil and lubricating oil to reduce friction and wear.
Other applications:
Used as a solvent, stabilizer and component of adhesives.
Safety and environmental protection:
- Toxicity: Low toxicity, but long-term contact may be irritating to the skin, eyes and respiratory tract. Animal experiments show that high doses may have effects on the nervous system and reproductive system.
- Environmental impact: Not easily biodegradable and may accumulate in water and soil. Care should be taken to prevent leakage and environmental pollution.
Storage and transportation:
- Storage:
Store in a cool, dry, well-ventilated place, away from fire and oxidants.
Avoid high temperature and humidity. - Transportation:
Transport as general chemicals, avoid severe vibration and high temperature.
Regulations:
- International regulations:
Required to comply with the regulations of various countries on the use and discharge of chemicals, such as REACH, RoHS, etc.
May be restricted in certain areas (such as food packaging and children's toys).
Pros and Cons:
- Advantages:
Highly effective flame retardant and plasticizing properties.
Good chemical stability and wide application range. - Disadvantages:
Potential environmental and health risks.
May be replaced by more environmentally friendly alternatives in some applications.
Triphenyl phosphate plays an important role in industrial and commercial applications, but its use should pay attention to safety and environmental issues, especially in areas where it needs to contact the human body or the environment.