Hydrogen Calibration Gas Mixture from Canada
5% hydrogen in nitrogen balance for gas detector calibration, technically pure hydrogen component but classified separately. Borderline case under HTS 2804.10.00.00 only if hydrogen dominates, but typically mixtures. Used in safety instrument calibration.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Clearly label as 'certified calibration gas' with NIST-traceable certificates for customs acceptance
• Include chromatograph analysis showing exact composition percentages