Gamma Acid Azo Coupler from Japan
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 — Japan → United States
21%
Rate breakdown
9903.04.628.5%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 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