Description

Tris(2-chloroethyl) phosphate (TCEP)

TCEP is a halogenated phosphate ester commonly used as a flame retardant and, in some formulations, as a plasticizer. It is widely encountered in plastics, textiles, and coatings.

Quick facts

• Chemical name: Tris(2-chloroethyl) phosphate
• Also known as: TCPP (in many contexts), among other synonyms
• Chemical formula: C6H12Cl3O4P
• Molar mass: ~285.4 g/mol
• Structure: A phosphate center (P=O) with three O–P–O–(CH2CH2Cl) groups

Typical uses

• Flame retardant additive for:
  • PVC and other plastics
  • Polyurethane foams
  • Textiles and coatings
• In some cases, used as a plasticizer or processing aid

Properties (general)

• Usually a viscous liquid at room temperature
• Moderately hydrophobic with low to moderate water solubility
• Relatively low volatility
• Can be hydrolyzed under certain conditions (especially at elevated temperatures or in acidic/basic environments), leading to degradation products such as chlorinated organics
• Persistent in the environment and may accumulate in aquatic systems

Health and safety considerations

• Can act as an irritant to eyes, skin, and the respiratory tract
• Potential hazard if ingested or inhaled in significant quantities
• Environmental toxicity: toxic to aquatic organisms at certain concentrations; persistence and bioaccumulation potential vary by formulation and exposure
• Handling should minimize exposure and release:
  • Use appropriate PPE (gloves, eye protection, ventilation as needed)
  • Store away from heat and incompatible materials
  • Dispose of waste in accordance with local hazardous waste regulations

Regulatory and environmental context

• Regulatory status for TCEP/TCPP varies by country and application
• Some jurisdictions have restrictions or specific labeling/handling requirements for flame retardants in consumer products
• When evaluating product formulation, consider potential environmental and health guidelines and any preferred alternatives

Handling and substitution tips

• If aiming to reduce halogen content or potential toxicity, consider halogen-free flame retardants or phosphorus-nitrogen systems
• For applications where flame retardancy is essential, explore alternatives such as:
  • Aluminum or magnesium hydroxides
  • Expandable graphite
  • Non-halogenated phosphorus-based flame retardants
• Always validate compatibility with your polymer matrix and processing conditions

Quick takeaway

• TCEP is a widely used halogenated flame retardant in plastics and textiles, valued for its fire-suppressing properties but associated with health and environmental considerations. If you’re evaluating it for a specific application, I can help compare it to non-halogenated alternatives or pull up precise regulatory and safety data for your region.

If you’d like, I can fetch exact data like CAS numbers, LD50 values, log Kow, or current regulatory lists for your country. What specific details would you like me to provide?