4-Aminobenzenesulfonic Acid (Sulfanilic Acid) from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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