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