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2921.42.90.00/4-Aminobenzenesulfonic Acid (Sulfanilic Acid)/Mexico

4-Aminobenzenesulfonic Acid (Sulfanilic Acid) from Mexico

Sulfanilic acid is an aromatic monoamine derivative featuring an amino group and a sulfonic acid group on a benzene ring, classified under HTS 2921.42.90.00 as an aniline derivative and its salt. It is primarily used in the synthesis of dyes, pharmaceuticals, and optical brighteners.

Duty Rate — Mexico → United States

100%

Rate breakdown

9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Calculate with your customs valueVerify classification with AI

Import Tips

• Verify purity certificate (typically 99%+) and CAS number 121-57-3 for customs classification as chemically defined compound

• Include Safety Data Sheet (SDS) showing it's not put up for retail sale to avoid Chapter 32 reclassification

4-Aminobenzenesulfonic Acid (Sulfanilic Acid) from Mexico — Import Duty Rate | HTS 2921.42.90.00