Pharmaceutical Grade Sulfanilic Acid USP from Mexico
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 — 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
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