Trimethyl Phosphate (TMP)
Trimethyl phosphate is the triester of phosphoric acid and methanol, used as a flame retardant, solvent, and pesticide intermediate. It qualifies under HTS 2920.90.51.00 as an ester of phosphoric acid (inorganic acid of nonmetal phosphorus). Common in polymer processing and extraction processes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered phosphoric acid ester without salt/halogenation emphasis
Phosphoric esters sometimes fall under 2919 if not explicitly 'other inorganic acid esters'.
If imported as flame retardant mixture or formulation
Prepared mixtures for specific uses like plastics processing move to Chapter 38.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Include REACH or TSCA registration numbers on commercial invoice for chemical compliance
• Verify phosphorous content via lab analysis to confirm Chapter 29 classification
Related Products under HTS 2920.90.51.00
Tellurium Diethyldithiocarbamate
Tellurium diethyl dithiocarbamate serves as rubber vulcanization accelerator. Classifies as ester derivative of tellurium inorganic acids with carbamate ligands under HTS 2920.90.51.00. Tire manufacturing application.
Tetraethyl Lead (TEL)
Tetraethyl lead is an organolead compound classified as an ester of inorganic lead acid with ethanol, used historically as an antiknock additive in gasoline. It falls under HTS 2920.90.51.00 as an ester of other inorganic acids of nonmetals (lead considered in context) and their derivatives. Modern imports are limited due to environmental regulations but occur for specialty fuel applications.
Triethyl Phosphate (TEP)
Triethyl phosphate, formed from phosphoric acid and ethanol, serves as a solvent, plasticizer, and flame retardant in resins and coatings. HTS 2920.90.51.00 covers it as an ester of phosphoric acid, a key nonmetal inorganic acid. Widely used in industrial solvent applications.
Tributyl Phosphate (TBP)
Tributyl phosphate is a phosphoric acid triester with butanol, employed in nuclear fuel reprocessing, solvent extraction, and as a defoamer. Classified in HTS 2920.90.51.00 for esters of inorganic phosphorus acids excluding halides. Key in hydrometallurgy processes.
Triphenyl Phosphate (TPP)
Triphenyl phosphate ester from phosphoric acid and phenol acts as a flame retardant in PVC, polyurethane, and engineering plastics. Falls under HTS 2920.90.51.00 as a nonmetal inorganic acid ester. Essential for consumer electronics housing.
Tris(2-chloroethyl) Phosphate (TCEP)
TCEP is a halogenated phosphoric triester used as a flame retardant in polyurethane foam and textiles despite regulatory scrutiny. HTS 2920.90.51.00 includes its halogenated derivatives of inorganic acid esters. Phased out in some uses but imported for industrial applications.