Thiosalicylic Acid from Canada
Thiosalicylic acid (2-mercaptobenzoic acid) is an aromatic organo-sulfur compound with both thiol and carboxylic acid groups, classified under HTS 2930.90.4950. Meets all Chapter 29 criteria for chemically defined sulfur-carbon compounds. Used as rubber accelerator intermediate and analytical reagent.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6095.8%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)
Import Tips
• Provide melting point range (165-170°C) confirmation for authenticity
• Include batch analysis showing <0.5% disulfide impurity
• Declare intended rubber accelerator use doesn't affect bulk chemical classification