3-Nitrobenzenesulfonic Acid from Canada
3-Nitrobenzenesulfonic acid features both nitro and sulfonic acid groups on the benzene ring, making it a sulfonated/nitrated derivative of benzenesulfonic acid (heading 2904). Classified under HTS 2913.00.40.00 as other aromatic derivatives. Key intermediate for direct dyes.
Duty Rate — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Water solubility testing required to confirm sulfonic acid functionality
• Position isomer (meta vs ortho/para) must match invoice description
• pH stability data helps distinguish from carboxylic acid derivatives