Gamma Acid Azo Coupler from China
Gamma Acid (2-amino-8-naphthol-3,6-disulfonic acid) couples with diazonium salts to form fast dyes for wool and silk. Classified in HTS 2927.00.40.00 per additional U.S. note 3 for essential azo dye components. Qualifies under chapter notes for chemically defined compounds used in dye synthesis.
Duty Rate — China → United States
31.5%
Rate breakdown
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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Declare CAS number (92-88-6 variant) and purity >95% to match regulatory listings
• Include wastewater treatment plan info if required for dye intermediate permits
• Store below 5°C during transit; thermal instability affects chapter note compliance