Trichlorotrifluoroethane Calibration Standard from Mexico
Certified reference material of CFC-113 in solvent matrix for gas chromatography calibration. The pure trichlorotrifluoroethane component classifies under HTS 2903.77.00.20 as a chemically defined perhalogenated compound. Diluted forms remain classified to the active compound per Chapter 29 note (d).
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
• Specify concentration and matrix solvent on invoice; remains classified to CFC if meeting chapter note (d)
• Include NIST traceability certificate for laboratory standards
• Declare as 'chemical reference standard' not 'refrigerant' to avoid regulatory confusion