Ethylene Calibration Gas 1.0% from Mexico
1.0% ethylene in nitrogen balance, certified reference gas for environmental monitoring and gas chromatography calibration. While technically a mixture, primary classification follows ethylene component per Chapter 29 rules for dilute solutions. NIST-traceable certification provided.
Duty Rate — Mexico → United States
10%
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 exact balance gas (N2, He, air) and concentration tolerance (±%) on commercial invoice,NIST SRM or equivalent traceability certificate prevents reclassification as generic mixture,CGA grade C valve connections standard for calibration gases