3,5-Naphthalenedisulfonic Acid from China
3,5-Naphthalenedisulfonic acid is a naphthalene derivative containing only sulpho groups, consistent with the scope of tariff item 2904.10.00. It is used in dye coupling and as an intermediate in organic synthesis. Although not explicitly named, it falls under the heading as a chemically defined sulfonated hydrocarbon derivative.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the product is a separate chemically defined compound with no impurities that could affect classification
• Document the isomer purity to avoid misclassification
• Verify if the product requires a Canadian import permit for chemical substances