US initiates expedited anti-dumping review on R-32 refrigerant from China
The US International Trade Commission has scheduled an expedited five-year review of the antidumping duty order on difluoromethane (R-32) from China under the Tariff Act of 1930. The review will determine whether revoking the current antidumping duties would likely cause material injury to the US industry. R-32 is a hydrofluoroolefin (HFO) refrigerant widely used in air-conditioning and heat-pump systems. Importers and distributors of Chinese-origin R-32 should monitor the review timeline and prepare for potential tariff changes.
Photo: Jan van der Wolf / PexelsUS Launches Expedited Anti-Dumping Review on Chinese R-32 Refrigerant
The US International Trade Commission announced on 26 May 2026 that it is scheduling an expedited five-year review of the antidumping duty order on difluoromethane (R-32) from China. Per the notice published in the Federal Register, the Commission will examine whether revocation of existing antidumping duties would be likely to lead to continuation or recurrence of material injury to the US domestic industry within a reasonably foreseeable time.
"The Commission hereby gives notice of the scheduling of an expedited review pursuant to the Tariff Act of 1930 to determine whether revocation of the antidumping duty order on difluoromethane (R-32) from China would be likely to lead to continuation or recurrence of material injury within a reasonably foreseeable time." — Federal Register, 26 May 2026
Difluoromethane, commonly known as R-32, is a hydrofluoroolefin (HFO) refrigerant classified under HS Chapter 29 (organic chemicals). R-32 is a critical component in modern air-conditioning systems, heat pumps, and refrigeration equipment. The expedited review process, rather than the standard five-year review timeline, indicates heightened concerns about potential dumping and market disruption if duties are lifted.
The expedited review mechanism allows the Commission to accelerate its investigation when there is evidence that revoking the order would likely result in material injury. Importers, distributors, and manufacturers relying on Chinese R-32 supplies should expect potential tariff adjustments depending on the review outcome. The current antidumping duty rate on R-32 from China remains in effect during the review period.
What this means for shippers
If you import R-32 from China, monitor the Commission's review schedule closely—expedited reviews can conclude faster than standard proceedings. Prepare duty-cost projections under both scenarios: continued duties or potential rate adjustments if the order is revoked. Document your supply-chain contracts and landed-cost models now to adapt quickly once the Commission issues its preliminary findings. /us-china-tariff-lookup
