HFC-143a Calibration Standard from Japan
NIST-traceable 1,1,1-trifluoroethane (HFC-143a) gas standard at 100 ppm in air for gas chromatography calibration. The principal HFC-143a component determines classification under HTS 2903.44.1020 as the named pure compound.
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%
Import Tips
• Include NIST SRM traceability certificate and gravimetric preparation method
• Cylinder passivated with electropolished 316L SS; certify <1 RA surface finish
• Expiration dating based on shelf life testing per ISO 6141 standard