1-Naphthylamine-8-sulfonic Acid (Peri Acid) from Japan
Peri acid is a monosulfonic derivative of 1-naphthylamine used in azo dye production for textiles. It falls under HTS 2921.45.90.90 as an unspecified derivative of α-naphthylamine, maintaining classification in the amine-function heading. The sulfonic acid enhances water solubility without altering the core amine classification.
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
• Certify via mass spectrometry that it's specifically the 8-isomer; positional isomers may have different statistical reporting
• Avoid aqueous solutions > standard concentrations, as they may fall outside Chapter 29 note (d)
• Document end-use as chemical intermediate, not finished dye product, to prevent Chapter 32 misrouting