2921.45.90.90/4-Amino-1-naphthalenesulfonic Acid/Japan

4-Amino-1-naphthalenesulfonic Acid from Japan

4-Amino-1-naphthalenesulfonic acid is a derivative of 1-naphthylamine with a sulfonic acid group, used primarily as an intermediate in dye manufacturing. It falls under HTS 2921.45.90.90 as a derivative of 1-naphthylamine (α-naphthylamine) that is not specifically listed elsewhere in the subheading. This aromatic monoamine derivative contains the characteristic amine-function group directly linked to the naphthalene ring.

Duty Rate — Japan → United States

16.5%

Rate breakdown

9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter

Calculate with your customs value Verify classification with AI

Import Tips

• Provide detailed chemical analysis (NMR, IR spectra) to confirm it's a naphthylamine derivative under Chapter 29 note (a)

• Ensure COA verifies purity >98% as impurities may affect classification; declare exact CAS number (84-86-6)

• Avoid misclassification as sulfonated dyes (Chapter 32); include lab reports showing amine-function dominance