Pharmaceutical Grade Sulfanilic Acid USP from Canada
USP-grade sulfanilic acid meets pharmacopeia standards for use in diagnostic reagents and synthesis of sulfa drugs, classified under HTS 2921.42.22.00 as a pure aromatic monoamine derivative. Its high purity ensures compliance with Chapter 29 requirements for separate chemically defined compounds.
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
• Include USP/EP certificate and DMF if destined for pharma use; FDA prior notice may apply
• Segregate from industrial grades to avoid contamination claims during customs inspection
• Watch for reclassification to 3002 if pre-formulated as immunological product