Trimethyl phosphate

Trimethyl phosphate (CAS 512-56-1), also known as TMP and trimethyl orthophosphate, is an organophosphate ester used industrially as a flame retardant additive and pH buffering agent.

Where is Trimethyl phosphate used?

• Plastics and polymers: flame retardant plasticizer
• Resins and coatings: incorporated to meet fire performance specifications
• Textiles: finishing agent where controlled phosphate release contributes to flame resistance
• Home care and industrial cleaning: pH buffer and sequestrant that stabilizes active ingredients across varying water hardness
• Leather and paper processing: applied where controlled acidity and surface treatment consistency are required
• Its low volatility and thermal stability make it a practical processing aid in polymer, textile and cleaning formulations.

Good to know: Buyers sourcing for specialty polymer or electronics applications should confirm specification sheets against process-specific purity requirements.

Commercial specifications

• Purity typically 99% or higher for industrial applications
• Clear liquid in drum and IBC quantities, with bulk tanker options for larger volumes