1-Naphthylamine-4,8-disulfonic Acid (C Acid) from United States
C Acid, or 1-naphthylamine-4,8-disulfonic acid, is a disulfonated derivative of 1-naphthylamine used in azo dye synthesis for textiles and leather. It is a chemically defined aromatic monoamine, classified under the tariff item for naphthylamine derivatives. The amine function is the principal characteristic, aligning with heading 29.21.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the product is a separate chemically defined compound under Chapter 29 Note 1(a)
• If the product is a salt, classify it with the parent compound per Note 5(C)(1)
• Provide a certificate of analysis to the CBSA to confirm the chemical identity