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

4-Amino-1-naphthalenesulfonic Acid from Mexico

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 — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter

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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