HFC-143a Supermarket Refrigerant R-508
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mixture contains any CFCs
Any presence of chlorofluorocarbons requires classification in the CFC-containing mixtures subheading.
If blend qualifies as biodiesel mixture (unlikely but possible additive)
Fatty acid methyl esters used as fuel classify under biodiesel provisions in heading 3826.
If recovered/recycled refrigerant classified as waste
Used or contaminated refrigerants treated as municipal wastes from chemical industries go to Chapter 38 waste headings.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• 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
Related Products under HTS 3827.61.00.00
HFC-143a Refrigerant Blend R-507
Azeotropic refrigerant blend consisting of 50% HFC-125 and 50% HFC-143a, exceeding 15% HFC-143a by mass. Used in commercial refrigeration systems like supermarket display cases and transport refrigeration. Classified under 3827.61.00.00 due to high HFC-143a content without CFCs or HCFCs.
HFC-143a R-404A Replacement Blend
Low-GWP refrigerant mixture with over 15% HFC-143a designed as drop-in replacement for R-404A in medium/high-temp refrigeration. Contains HFC-143a blended with other HFCs for cascade systems. Meets 3827.61.00.00 criteria for HFC-143a dominant mixtures.
HFC-143a Industrial Chiller Fluid
Specialty HFC blend for centrifugal chillers containing ≥15% HFC-143a by mass, used in large HVAC systems for commercial buildings. Optimized for high-pressure applications without ozone-depleting substances. Falls under 3827.61.00.00 per HFC-143a concentration requirements.
HFC-143a Transport Refrigeration Blend
HFC mixture exceeding 15% HFC-143a for refrigerated trucks and containers, providing reliable cooling for perishable goods transport. Compliant with HFC-only specifications excluding CFCs/HCFCs. Classified in 3827.61.00.00 based on HFC-143a mass threshold.