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2922.21.50.00/1-Naphthylamine-4-sulfonic Acid (Naphthionic Acid)/Japan

1-Naphthylamine-4-sulfonic Acid (Naphthionic Acid) from Japan

Naphthionic acid is an aminohydroxynaphthalenesulfonic acid derivative used in azo dye synthesis and pharmaceutical intermediates. Its structure includes amino and sulfonic acid groups on naphthalene with oxygen-function characteristics. Classified in 2922.21.5000 as other such compounds.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• Submit CoA with assay >98% purity to confirm chemically defined status per Chapter notes

• Label as 'not for retail sale' to prevent Chapter 32 reclassification