HFC-143a Supermarket Refrigerant R-508 from Japan

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 — Japan → United States

13.7%

Rate breakdown

9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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