1,3,6/1,3,7-Naphthalenetrisulfonic Acid Technical Grade from Japan
Technical grade mixture of 1,3,6- and 1,3,7-naphthalenetrisulfonic acid is used in industrial dye synthesis. It contains only sulpho groups and falls under tariff item 2904.10.00 as a sulfonated hydrocarbon derivative. The mixture of isomers is covered under Chapter 29 Note 1(b) as a mixture of isomers of the same organic compound.
Duty Rate — Japan → Canada
0%
Import Tips
• Document the isomer ratio to confirm classification as a mixture of isomers under Chapter 29 Note 1(b)
• Ensure the product is not mixed with other chemicals that could change its classification
• Check for any Canadian environmental regulations on sulfonic acids