8-Amino-2-naphthalenesulfonic Acid (1,8 Cleve's Acid) from United States
8-Amino-2-naphthalenesulfonic acid, or Cleve's acid 1,8-isomer, is a naphthylamine derivative used in direct dye synthesis. It is a chemically defined aromatic monoamine with a sulfonic acid group, classified under the tariff item for naphthylamine derivatives. The primary amine function determines its classification in heading 29.21.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the product meets the definition of a separate chemically defined compound under Chapter 29 Note 1(a)
• If the product is a mixture of isomers, confirm it qualifies under Note 1(b)
• Provide a certificate of analysis to the CBSA to support the classification