2921.45.90/6-Amino-1-Naphthol-3-Sulfonic Acid (J Acid)/Japan

6-Amino-1-Naphthol-3-Sulfonic Acid (J Acid) from Japan

J Acid contains amino group on naphthalene making it a naphthylamine derivative despite hydroxy substituent. Classifies HTS 2921.45.90 as 'other' aromatic monoamine derivative. Oxygen function secondary to nitrogen-function per Chapter 29 rules.

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

• Highly reactive; must ship with stabilizer per chapter note (f)

• Distinguish from Gamma acid (8-isomer); CAS 89-63-4 specific

• Oxidation sensitivity requires nitrogen blanketing in packaging