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2903.44.10.20/HFC-143a Calibration Standard/Mexico

HFC-143a Calibration Standard from Mexico

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 — Mexico → United States

13.7%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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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

HFC-143a Calibration Standard from Mexico — Import Duty Rate | HTS 2903.44.10.20