2-Naphthylamine-6-sulfonic Acid (Laurent's Acid) from Japan
Laurent's Acid is a sulfonated derivative of 2-naphthylamine (β-Naphthylamine) used in manufacturing acid dyes and pharmaceuticals. Classified under HTS 2921.45.90 as 'other' aromatic monoamine derivatives; salts thereof in Chapter 29. The retained naphthylamine structure governs classification over sulfonation.
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
• CAS 92-43-3 must appear on invoice; distinguish from Tobias acid (2.8-isomer) to ensure correct HTS
• Beta-naphthylamine derivatives require carcinogen handling precautions; include safety data
• Avoid bulk packaging over 25kg without proper stabilization per chapter note (f)