Mixed Naphthylamine Sulfonic Acids for Dye Synthesis from China
This commercial mixture contains 5- and 8-amino-2-naphthalenesulfonic acid isomers as explicitly described in HTS 2921.45.25.00. Used in multi-component dye formulations, it qualifies as an amine-function compound mixture under Chapter 29 note (b) for isomers. The specific naming governs over general provisions.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Provide quantitative HPLC analysis showing isomer ratios for customs verification
• Use anti-dusting agents only if needed for safety per Chapter note (g); excess disqualifies
• Declare as 'dye intermediate mixture' not 'technical grade' to maintain Chapter 29 status