Guaiacol Carbonate from Mexico
Guaiacol carbonate is a derivative formed by esterification of guaiacol, used historically as an antitussive agent in respiratory medications. As a chemically defined derivative of guaiacol (ether-phenol), it qualifies under HTS 2909.50.20.00. Imported primarily for pharmaceutical intermediate production.
Duty Rate — Mexico → United States
15.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include structural formula and CAS number (10197-20-0) on commercial invoice to confirm derivative status under guaiacol heading
• Verify no halogenation or sulfonation that might shift classification to earlier derivative subheadings per chapter notes
• Obtain prior FDA notification if destined for drug manufacturing to avoid customs holds on pharmaceutical precursors