Sodium 1-Naphthol-4-Sulfonate from Mexico
Sodium 1-Naphthol-4-Sulfonate is the sodium salt of 1-naphthol-4-sulfonic acid, classified under tariff item 2907.15.00 as a naphthol salt. It serves as a diazo dye coupling component in textile coloration, where its naphthol structure is essential for the coupling reaction. The salt form is covered by Chapter 29 Note 5(C)(1), which directs inorganic salts of organic compounds to the heading of the parent compound.
Duty Rate — Mexico → Canada
Import Tips
• Confirm the product is the sodium salt and not the free acid, as the salt form is specifically covered by the tariff item
• Provide the CAS number and structural formula in the import documentation to expedite CBSA clearance
• Be aware that the product may be regulated under the Canadian Environmental Protection Act (CEPA) for industrial use