Trimellitic Anhydride (TMA)
Trimellitic anhydride is a tri-carboxylic aromatic acid anhydride used in wire enamel coatings and high-temperature plastics. Falls under HTS 2917.39.30.00 as described in additional U.S. note 3 to section VI for quota-controlled aromatic polycarboxylic derivatives.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered cyclic nucleic acid derivative
Structural similarity to some nucleoside derivatives could cause Chapter 29 misclassification.
If carboxylic acid halide derivative
Halogenated derivatives of trimellitic acid classify under carboxylic acid halides.
If in polyester prepolymer
Reactive oligomers containing TMA units become plastics under Chapter 39.
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Import Tips & Compliance
• Smaller quota volumes; monitor remaining balance via Federal Register notices
• Safety data sheet required showing <0.1% trimellitic acid content to qualify as pure anhydride
Related Products under HTS 2917.39.30.00
1,4-Naphthalenedicarboxylic Acid
Aromatic polycarboxylic acid derived from naphthalene, used in high-performance polyester resins and liquid crystal polymers. Included in HTS 2917.39.30.00 under additional U.S. note 3 to section VI for specific aromatic diacids subject to import quotas.
Terephthalic Acid (PTA)
Terephthalic acid is an aromatic polycarboxylic acid used primarily as a raw material in producing polyethylene terephthalate (PET) for bottles and fibers. It falls under HTS 2917.39.30.00 as a product described in additional U.S. note 3 to section VI, specifically covering certain aromatic polycarboxylic acids subject to quantitative limitations.
Dimethyl Terephthalate (DMT)
Dimethyl terephthalate is the dimethyl ester of terephthalic acid, an aromatic polycarboxylic acid derivative used in polyester fiber and film production. Classified under HTS 2917.39.30.00 due to inclusion in additional U.S. note 3 to section VI for quota-controlled aromatic compounds.
Isophthalic Acid (IPA)
Isophthalic acid, a meta-isomer of benzene dicarboxylic acid, is an aromatic polycarboxylic acid used in resin, coating, and copolyester production. It qualifies for HTS 2917.39.30.00 as specified in additional U.S. note 3 to section VI for import quota management.
Purified Terephthalic Acid (PTA) Flakes
High-purity terephthalic acid in flake form (>99.99% purity) for direct polymerization into PET without ester interchange. Falls under HTS 2917.39.30.00 per additional U.S. note 3 to section VI due to its status as a quota-controlled aromatic polycarboxylic acid.
Phthalic Anhydride (Technical Grade)
Cyclic anhydride of ortho-phthalic acid, an aromatic polycarboxylic acid derivative used in plasticizer and resin manufacturing. Subject to HTS 2917.39.30.00 classification per additional U.S. note 3 to section VI for quota management.