7-(Methylamino)-1-naphthol-3-sulfonic Acid from Mexico
Naphthol isomer specifically enumerated in HTS 2922.29.10.00. Amino-naphthol with sulfonic acid and methylamino groups. Essential for azoic dye coupling components.
Duty Rate — Mexico → United States
15.8%
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
• Isomer purity >98% by HPLC; sodium salt common—declare form; dye coupling activity test