4-Amino-3-hydroxy-1-naphthalenesulfonic acid from United States
4-Amino-3-hydroxy-1-naphthalenesulfonic acid is a chemically defined aminohydroxynaphthalenesulphonic acid with amino, hydroxy, and sulfonic groups. It is used as a building block for direct and metal complex dyes, and falls under tariff item 2922.21.00.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the product is not mixed with other isomers unless they are of the same compound; mixtures of isomers are allowed under chapter note 1(b)
• Provide a certificate of analysis to verify purity and structure
• Consult the CBSA's D10 database for the current MFN duty rate, which may be free