Other
Esters of other inorganic acids of nonmetals (excluding esters of hydrogen halides) and their salts; their halogenated, sulfonated, nitrated or nitrosated derivatives: > Other: > Aromatic: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2920.90.20.00
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.
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.
Phenyl Phosphonic Acid Diethyl Ester
Mixed aromatic-aliphatic phosphonate ester used in flame retardants and agrochemical intermediates. Classified under HTS 2920.90.2000 as aromatic ester of phosphonic acid with principal phenyl recognition. Meets chapter note requirements for acid-function esters.
p-Nitrophenyl Phosphate
p-Nitrophenyl phosphate (pNPP) is a chromogenic substrate for alkaline phosphatase enzyme assays in biotechnology. Classified under HTS 2920.90.2000 as nitrated derivative of aromatic phosphoric acid ester. Yellow color results from nitro substitution on phenyl ring.
Resorcinol Bis(diphenyl Phosphate)
RDP is a halogen-free flame retardant derived from resorcinol and phenyl phosphates for engineering plastics. Falls under HTS 2920.90.2000 as aromatic phosphoric acid ester per numerical order rule. High thermal stability for polycarbonate applications.