Triphenyl Phosphate
Triphenyl phosphate is an aromatic ester of phosphoric acid used as a flame retardant in plastics and resins. It falls under HTS 2920.90.2000 as an aromatic ester of an inorganic acid (phosphoric acid) of a nonmetal (phosphorus), excluding hydrogen halides. Its structure features three phenyl groups attached to the phosphate core.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by phosphorous function rather than ester
Phosphoric esters can sometimes be classified under heading 2919 for phosphorous oxyacids if ester group not principal function.
If when imported as flame retardant mixture/additive preparation
Mixtures containing triphenyl phosphate as component fall under Chapter 38 prepared chemical preparations.
If containing other organo-inorganic metal compounds
Organo-inorganic compounds with metals linked to carbon classified in heading 2931 instead of acid esters.
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Import Tips & Compliance
• Provide detailed chemical composition and CAS number (115-86-6) on commercial invoice for proper classification
• Ensure SDS (Safety Data Sheet) accompanies shipment due to flammability and toxicity hazards
• Verify REACH compliance if transshipping through Europe; common pitfall is misclassifying as plastic additive under Chapter 39
Related Products under HTS 2920.90.20.00
Cresyl Diphenyl Phosphate
Mixed aromatic phosphate ester combining cresyl and phenyl groups, used in hydraulic fluids and flame retardants. Falls under HTS 2920.90.2000 as 'other' aromatic esters of phosphoric acid. Chemically defined with specific CAS 26444-49-5.
Diphenyl Phosphorochloridite
Aromatic chloridite ester used as intermediate in pharmaceutical synthesis and organophosphorus chemistry. Although containing chlorine, classified under 2920.90.2000 as phosphoric acid ester derivative, not hydrogen halide ester per chapter exclusion. Chemically defined with P-Cl and P-OPh2 structure.
Diphenyl Methylphosphonate
Aromatic phosphonate ester with methyl substitution, used in extractive metallurgy and as flame retardant. Falls under HTS 2920.90.2000 as 'other' aromatic ester of phosphonic acid. Chemically defined per chapter note (a).
Phenethyl Bromide Phosphonate Ester
Halogenated aromatic phosphonate used in pharmaceutical synthesis and polymer chemistry. Classified under HTS 2920.90.2000 as halogenated derivative of aromatic phosphonic acid ester per chapter note. Bromine substitution on phosphonate chain.
Tricresyl Phosphate (TCP)
Tricresyl phosphate is an aromatic organophosphate ester used as plasticizer and flame retardant in PVC and lubricants. Classified under HTS 2920.90.2000 as an aromatic ester of phosphoric acid with cresyl (methylphenyl) groups. It meets chapter 29 criteria for chemically defined inorganic acid esters.
Triphenyl Phosphite
Triphenyl phosphite serves as a stabilizer and antioxidant in polymer processing. Technically a phosphite ester (P(OR)3) but classified under HTS 2920.90.2000 as aromatic ester of phosphorous acid per HTS structure. Chemically defined with CAS 101-02-0.