1-Naphthylamine-4,8-disulfonic Acid from Japan
This disulfonic acid derivative of 1-naphthylamine serves as a key intermediate for acid dyes and azoic coupling components. Classified under HTS 2921.45.90.90 as an 'other' derivative of α-naphthylamine, it retains the primary aromatic amine function despite sulfonic substitutions. The classification follows Chapter 29 rules prioritizing amine-function compounds.
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
• Declare structural formula and confirm naphthylamine backbone via HPLC; multiple sulfonic groups don't change amine classification
• Include safety data showing it's not a finished dye (no coloration function) to prevent Chapter 32 reclassification
• For bulk shipments, ensure stabilizers (if added) comply with Chapter 29 note (f) for transport only