HFC-23 Calibration Gas Standard from Canada
NIST-traceable calibration mixture containing known HFC-23 concentrations for greenhouse gas monitoring equipment. Classified under HTS 3827.59.00.00 as HFC mixture. Used by EPA-approved testing laboratories.
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
• Include NIST certificate of analysis; verify cylinder pressure test dates; provide uncertainty budget for concentrations