Medical Grade HFC-143a Propellant from Mexico
Pharmaceutical-grade 1,1,1-trifluoroethane (HFC-143a) for metered dose inhalers and medical aerosols. Falls under HTS 2903.44.1020 as a pure chemically defined organic compound specifically enumerated in the HFC-143a tariff provision.
Duty Rate — Mexico → United States
13.7%
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
• File Drug Master File (DMF) with FDA; provide USP/EP monograph compliance certificates
• Use validated cleaning procedures documentation to prove no cross-contamination from other HFCs
• Include sterility validation if for sterile inhalers; maintain cold chain (-20°C) during ocean transport