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1-Naphthol-3,6-disulfonic acid from Japan

Also known as 1,4-dihydroxy-2,7-naphthalenedisulfonic acid or H-acid in dye chemistry, this compound is explicitly listed under HTS 2908.99.0300. It features a naphthol structure with two sulfo groups, classifying as a sulfonated phenol derivative containing only sulfo groups. Critical intermediate for reactive dyes used in textiles.

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%

Import Tips

Use trade name 'H-acid' with chemical synonyms on documentation for customs recognition

Ensure pH stability in transport; acid form requires corrosion-resistant packaging

Batch testing for isomer purity critical, as chapter note (b) excludes certain isomer mixtures

1-Naphthol-3,6-disulfonic acid from Japan — Import Duty Rate | HTS 2908.99.03.00