H Acid Free Acid (4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid) from United States
H Acid Free Acid (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid) is a separate chemically defined aminohydroxynaphthalenesulphonic acid. It is used in dye coupling reactions and is classified under tariff item 2922.21.00.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the free acid is not contaminated with salts or other isomers
• Provide a detailed product specification sheet to the CBSA
• Verify the MFN duty rate; it may be duty-free under certain trade agreements