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2903.43.10.00/Fluoromethane (HFC-41) Calibration Gas/Japan

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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• NIST-traceable certificates; dilute gas transport regs (UN1956)

• Issue: Over-dilution may classify as prepared lab reagent

Fluoromethane (HFC-41) Calibration Gas from Japan — Import Duty Rate | HTS 2903.43.10.00