Pharmaceutical Guaifenesin API from Mexico
Active pharmaceutical ingredient guaifenesin (3-(2-methoxyphenoxy)-1,2-propanediol) for mucolytic formulations. Meets Chapter 29 note (a) as separate chemically defined aromatic ether-alcohol. Bulk import for cough syrup and tablet production.
Duty Rate — Mexico → United States
10%
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
• Submit FDA import alert 99-30 exemption documentation for API clearance
• Label containers with CAS 93-14-1, molecular formula C10H14O4, and purity statement
• Segregate from finished drugs to avoid Chapter 30 classification during customs exam