7-Amino-1,3,6-naphthalenetrisulfonic acid (R-acid) from China
R-acid (7-Amino-1,3,6-naphthalenetrisulfonic acid) is a trisulfonated naphthylamine used for direct dyes. It is classified under tariff item 2921.45.00 as a derivative of naphthylamine with multiple sulfonic acid groups.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the product is classified as a chemically defined aromatic amine derivative; provide the chemical name and CAS number
• Check if the product is subject to Canadian environmental regulations
• Maintain proper documentation for CBSA