Dye Coupling Grade Naphthalenetrisulfonic Acid Isomer Mix from China
Specialty isomer mixture (1,3,6- and 1,3,7-naphthalenetrisulfonic acids) optimized for diazo coupling in azo pigment production. HTS 2904.10.15.00 applies as chemically defined sulfonated naphthalene derivative per Chapter 29 exclusions from dyes.
Duty Rate — China → United States
43%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 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
• Request supplier Certificate of Analysis specifying <0.5% impurities to maintain Chapter 29 chemical compound status
• Avoid retail packaging; bulk industrial shipments prevent shift to Chapter 32 retail dye provisions
• Check REACH compliance documentation for EU-origin material destined for US transshipment