CFC-114 Calibration Gas Standard from Canada
Dichlorotetrafluoroethane in precise concentrations for gas chromatography calibration falls under HTS 2903.77.00.30 as a chemically defined compound per Chapter 29 note (a). Dissolved or mixed only as allowed in notes (d)-(g) for safety/transport. Used in environmental labs to calibrate ozone-depleting gas detectors.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide NIST-traceable certificates of analysis to prove calibration-grade purity and concentration
• Declare cylinder specifications; DOT hazmat compliance is critical for compressed gas imports
• Avoid classification as mixtures if solvent is solely for transport per note (e)