1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid from Germany
This specific diaminohydroxynaphthalenedisulfonic acid is explicitly listed in HTS 2922.21.1000 and serves as a diazo coupling component in acid dye synthesis. Its structure features both amino (-NH2) and hydroxy (-OH) oxygen functions on the naphthalene ring with sulfonic acid groups. Supplied as technical grade powder (95%+ purity) for chemical manufacturing.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Batch testing required to verify isomer identity versus other naphthalenedisulfonic acids
• Moisture content analysis prevents weight-based duty disputes on hygroscopic material
• EPA TSCA certification needed for US manufacturing introduction