Trimellitic Anhydride (TMA) from Mexico
Trimellitic anhydride is a trifunctional aromatic acid anhydride used in wire enamels, plasticizers, and alkyd coatings. It qualifies under HTS 2917.39.70.00 as an aromatic polycarboxylic acid derivative (anhydride form) not specifically provided for elsewhere. The solid flakes are highly reactive with amines.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Anhydride classified with parent acid per Chapter Note 5(E); provide structural confirmation
• Flammable solid Class 4.1 shipping; ensure proper UN packaging and MSDS documentation