2927.00.40.00/H Acid Coupling Component/Japan

H Acid Coupling Component from Japan

H Acid (1-amino-8-naphthol-3,6-disulfonic acid) serves as an azo coupling agent for substantive dyes on cotton. Though primarily phenolic, its role in azo dye synthesis links it to products in additional U.S. note 3 under HTS 2927.00.40.00. This chemically defined compound is essential for dye chemistry per chapter scope.

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

• Ensure documentation specifies use in diazo coupling to justify note 3 classification over general aromatics

• Test for heavy metal impurities; sulfonated compounds often require REACH-like compliance data

• Ship in stabilized aqueous solution only if per chapter note (d) for water-dissolved products