HFC-143a Supermarket Refrigerant R-508 from Canada
Azeotropic blend of HFC-23 and HFC-143a (>15% by mass) for low-temperature supermarket freezers and ice cream cabinets. Provides superior cascade refrigeration performance. Qualifies for 3827.61.00.00 due to specified HFC-143a content.
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
• Require NIST-traceable composition analysis; customs rejects self-certification for azeotropic blends
• Include end-user retrofit compliance statements for R-502 replacement to avoid EPA hold at entry
• Package in DOT-spec cylinders only; non-compliant packaging results in refused entry and disposal costs