K Acid (1-Naphthylamine-8-sulfonic Acid) from Japan
K Acid acts as a dye intermediate with amino and sulfonic groups on 1-naphthol structure. Meets definition of oxygen-function amino-compound under Chapter 29 notes. HTS 2922.21.5000 covers this as other aminohydroxynaphthalenesulfonic acid.
Duty Rate — Japan → United States
16.5%
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
Import Tips
• Certify <0.1% heavy metals per dye industry standards
• Use 'pure' vs 'technical grade' distinction on labels
• Avoid generic 'aromatic sulfonic acid' descriptions