Fluoromethane (HFC-41) Calibration Gas from Japan
Trace amounts of HFC-41 in nitrogen mixtures serve as calibration standards for environmental gas analyzers monitoring fluorocarbon emissions. The pure HFC-41 component drives classification under HTS 2903.43.10.00. Used in labs for regulatory compliance testing.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• NIST-traceable certificates; dilute gas transport regs (UN1956)
• Issue: Over-dilution may classify as prepared lab reagent