Triethyl Phosphate (TEP) Flame Retardant Plasticizer

Name: Triethyl Phosphate (TEP) Flame Retardant Plasticizer
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 78-40-0

Triethyl phosphate (TEP) is a low-viscosity organophosphorus ester that functions as both a flame retardant and a plasticizer for cellulose acetate, polyurethane foams, and unsaturated polyesters. Its high phosphorus content (18.9%) provides efficient flame retardancy at relatively low loading levels. TEP is also widely used as a reactive diluent in fire-suppression fluid formulations and as a catalyst in polyurethane synthesis. Its water miscibility makes it suitable for waterborne intumescent coating systems.

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Technical Specifications

appearance	Colorless transparent liquid
water solubility	Miscible
boiling point (°C)	215–216
phosphorus content (%)	18–19
density (20°C, g/cm³)	1.069–1.072
refractive index (nD20)	1.405–1.407

Applications

Cellulose acetate and cellulose nitrate lacquer flame retardant plasticizer
Flexible and semi-rigid polyurethane foam flame retardant additive
Unsaturated polyester resin reactivity diluent with FR function
Waterborne intumescent coating formulation component
Catalyst and reactive diluent in polyurethane synthesis

Key Features

Highest phosphorus content among common trialkyl phosphate FRs at 18.9% enables efficient FR activity
Water-miscible liquid for direct use in waterborne coatings and aqueous textile treatments
Dual function as plasticizer reduces brittleness in cellulose and polymer systems while adding FR
Low viscosity (2.6 mPa·s) for easy processing and uniform distribution in foam and coating systems