1,2,4,5-Tetracarboxybenzene (Pyromellitic Acid) from Japan
Pyromellitic acid, the diacid precursor to PMDA, is used in specialty polyimides and electronic materials. Classified under HTS 2917.39.70.00 as an aromatic polycarboxylic acid (four -COOH groups on benzene). Typically handled as dihydrate form.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Dihydrate form classified with anhydrous acid per Chapter Note 5(F) stabilizer provisions
• Document water content <15% to avoid Chapter 28 inorganic salt classification
• Requires REACH/ TSCA registration verification for US import clearance