o-Nitroaniline-p-sulfonic acid, sodium salt from Mexico
The sodium salt of o-nitroaniline-p-sulfonic acid (4-amino-2-nitrobenzenesulfonic acid sodium salt) is specifically named in HTS 2921.42.36.00. Essential for direct dye synthesis.
Duty Rate — Mexico → United States
10%
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
• Molecular formula confirmation C6H5N2O5SNa required for exact HTS match
• Light-sensitive; packaging must prevent degradation affecting purity specs
• Common misclassification as 3204 dye product; remains chemical intermediate