Neville-Winter Acid (1-Naphthylamine-5-sulfonic Acid) from China
Neville-Winter Acid (1-Naphthylamine-5-sulfonic Acid) is an aminohydroxynaphthalenesulfonic acid used in acid dye manufacturing. Its structure with amino and sulfonic groups on naphthalene places it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
Duty Rate — China → Canada
0%
Import Tips
• Check if the product is imported in solution; if so, ensure the solvent is for safety or transport only, per Chapter 29 Note 1(e)
• Provide a certificate of analysis to confirm the chemical identity and purity
• Be aware that any added stabilisers must be necessary for preservation or transport