Sodium Salt of 1-Amino-8-naphthol-3,6-disulfonic Acid (H Acid) from China
H Acid sodium salt is a critical coupling component for reactive dyes, featuring amino-hydroxy-disulfonic functions on naphthalene. It meets Chapter 29 criteria for chemically defined amino-oxygen compounds and their salts. Positioned in 2922.21.5000 as 'other' aminohydroxynaphthalenesulfonic acids.
Duty Rate — China → United States
41.5%
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
• Declare exact salt form and water content; discrepancies lead to duty disputes
• Use HTSUS advisory rulings for multi-sulfonic derivatives to preempt CBP challenges
• Avoid packaging resembling retail dye forms (Chapter 32 exclusion)