4-Hydroxycoumarin USP Grade from Mexico
USP-grade 4-Hydroxycoumarin meets pharmacopeia standards for research and synthesis. It is classified under HTS 2932.20.2500 as the pure aromatic lactone heterocyclic compound.
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
• Provide USP/EP certificates of analysis; segregate from technical grades
• Watch for dual-use export controls if rodenticide precursor