5-Amino-2-naphthalenesulfonic Acid (1,5 Cleve's Acid) from Canada
5-Amino-2-naphthalenesulfonic acid, also known as Cleve's acid 1,5-isomer, serves as a critical coupler in azo pigment production. It qualifies under HTS 2921.45.25.00 due to its explicit inclusion in mixtures and as a 2-naphthylamine sulfonic derivative. As a separate chemically defined compound, it aligns with Chapter 29(a).
Duty Rate — Canada → United States
10%
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
• Submit structural confirmation via NMR to validate aromatic monoamine classification
• Use UN-approved plastic drums with liners for moisture-sensitive sulfonic acids
• Check for nitrogen content labeling to prevent reclassification under sulfonated hydrocarbons