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K-acid (4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid) from United States

K-acid (4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid) is a chemically defined organic compound with multiple sulfonic groups, enhancing water solubility for use as a coupling component in substantive dyes. Its structure as an aminohydroxynaphthalenesulphonic acid 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 — United States → Canada

0%

Import Tips

• Verify that the product is not put up in measured doses or for retail sale, as that would shift classification per Section VI Note 2

• Provide a detailed chemical analysis to confirm the presence of amino, hydroxy, and sulfonic groups

• Consider consulting a customs broker for accurate classification, as disulfonic acids may have specific duty implications