Medical-Grade HFC-23 Calibration Gas from Mexico
High-purity trifluoromethane (HFC-23) diluted in balance gas for calibrating medical gas analyzers and environmental monitoring equipment. Falls under HTS 2903.41.10.00 as a chemically defined organic compound per Chapter 29 note 1(a), with dilution allowed under note 1(d) if for safety/transport.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide NIST-traceable certificates of analysis showing HFC-23 concentration (typically 10-50 ppm) and balance gas composition
• Comply with FDA 21 CFR 201.161 for medical device calibration gases if end-use requires it