1-Naphthylamine-8-sulfonic Acid (Peri Acid) from Canada
Peri Acid serves as a dye intermediate for naphthol AS dyes used in textile coloration. It qualifies under HTS 2921.45.90 as an 'other' 1-Naphthylamine derivative per Chapter 29's amine-function compounds. The peri-position sulfonic acid maintains aromatic monoamine classification.
Duty Rate — Canada → 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
• Use systematic name 8-amino-1-naphthalenesulfonic acid (CAS 82-75-7) on all docs
• Test for heavy metal impurities; exceedances trigger additional EPA scrutiny
• Declare intended dye manufacturing use to prevent reclassification as finished colorant