Chemours Launches Five Faizeon Fluids for Two-Phase Data Center Cooling
Four fluids serve direct-to-chip cold plates and one serves immersion tanks. Boiling points run from minus 21 degrees F to 120 degrees F, and vapor pressures reach 175.7 psia at 113 degrees F.
Chemours has moved its data center cooling fluids under a new brand, Faizeon, and widened the line to five products. Four are for two-phase direct-to-chip cold plates. The fifth, Faizeon 500, is the immersion fluid Chemours previously sold as Opteon 2P50. The company announced the portfolio in a release distributed Nov. 3.
Chemours confirmed to the trade site Cooling Post that the range includes HFOs and HFO blends. Working from the published data sheets, Cooling Post concluded that Faizeon 100 appears to be HFO-1336mzz(Z), Faizeon 110 HFO-1336mzz(E), and Faizeon 200 and 220 the nonflammable blends R-515B and R-513A. It said the specifications for Faizeon 500 point to HFO-153-10mczz-E, a molecule on which Chemours holds patents.
"AI's rapid growth is increasing the demands on data center infrastructure, and cooling is becoming a critical constraint," said Denise Dignam, Chemours president and CEO. She said the company's liquid cooling team is working across the data center supply chain "to bring together the expertise, testing, and support needed to confidently deploy two-phase liquid cooling at scale."
From Below-Atmosphere Loops to Chiller-Grade Pressures
The four cold-plate fluids split into two pressure classes. Faizeon 100 boils at 92.2 degrees F at atmospheric pressure, and its vapor pressure at 77 degrees F is 10.7 psia, below atmospheric. Chemours pitches it for retrofit deployments and says the low pressure can reduce the wall thickness needed in cold plates and connecting lines. Faizeon 110 boils at 46.2 degrees F.
Faizeon 200 and 220, the two blends, operate at far higher pressures. Faizeon 200 boils at minus 2.1 degrees F and reaches 127.1 psia at 113 degrees F, and Chemours calls it the "industry standard for medium pressure systems," for both in-rack and in-row coolant distribution units. Faizeon 220 boils at minus 21 degrees F and reaches 175.7 psia at 113 degrees F. Chemours says its properties allow "the most compact installations and smaller connecting lines." Each of the four data sheets describes the fluid as nonflammable and low toxicity, safety class A1, with occupational exposure limits from 400 ppm to 810 ppm.
| Fluid | Use | Boiling point at 1 atm | Vapor pressure at 77 F | GWP |
|---|---|---|---|---|
| Faizeon 100 | Direct-to-chip, low pressure | 92.2 F | 10.7 psia | 2.08 (AR6) |
| Faizeon 110 | Direct-to-chip, low pressure | 46.2 F | 28.1 psia | 18 (AR6) |
| Faizeon 200 | Direct-to-chip, medium pressure | -2.1 F | 72.3 psia | 293 (AR4) |
| Faizeon 220 | Direct-to-chip, medium pressure | -21 F | 103.0 psia | 629 (AR4) |
| Faizeon 500 | Two-phase immersion | 120 F | 0.040 MPa | 10 (AR6) |
The Faizeon 500 sheet still calls it a "developmental fluid." It lists a dielectric constant of 1.82 and a breakdown voltage of 41.3 kV per 0.1 inch, and Chemours says it supports waste heat recovery.
Where the 19-Degree Figure Comes From
Chemours says that in independent third-party testing, a two-phase direct-to-chip system using Faizeon 200 kept a GPU up to 19 degrees Celsius cooler than a single-phase, water-based fluid while using a lower coolant flow rate. The document it cites is a white paper from Accelsius, one of seven partners Chemours named alongside Oak Ridge National Laboratory, NTT Data, 2CRSi, DataVolt, Munters and ZutaCore.
The paper describes a Dell PowerEdge XE9680L with eight Nvidia B200 GPUs, about 10 kW of thermal design power, tested by an unnamed systems integrator across roughly 40,000 operating points. The factory single-phase cold plates were swapped for Accelsius NeuCool two-phase plates. The 19-degree gap was on the downstream cold plate of a series pair, and at the full-system level the margin was 9 to 14 degrees. Two-phase flow was 0.55 liters per minute per kilowatt against 1.5 for the water loop. The paper credits the result to the NeuCool system and does not identify the fluid. Chemours ties it to Faizeon 200 on its product page.
Why This Matters to Contractors
The Accelsius test's facility-side numbers are where Faizeon's market reaches the mechanical room. The GPU temperatures the stock water loop held with 45 C (113 F) facility water, the two-phase system matched at 54 C (129 F), and at up to 59 C (138 F) once facility flow was doubled. The paper says that margin allows year-round free cooling in most climates and can defer chiller spending. Inside the white space, a Faizeon 220 loop at 175.7 psia is closer to a refrigerant circuit than a water loop, with the brazing, leak checking and recovery work that implies.
Sources
- Chemours, "Chemours Launches Faizeon Two-Phase Liquid Cooling Solutions for AI Data Centers," Nov. 3, 2026 (via 3BL). 3blmedia.com
- Chemours, "Two-Phase Direct-to-Chip Cooling," Faizeon product page and linked technical data sheets for Faizeon 100, 110, 200 and 220. faizeon.com
- Chemours, "Two-Phase Immersion Cooling," Faizeon product page and linked Faizeon 500 technical data sheet. faizeon.com
- Accelsius, "Warm-Water Ready: Benchmarking Two-Phase vs. Single-Phase Direct-to-Chip Cooling on an NVIDIA B200 Server," 2026. accelsius.com
- Cooling Post, "Chemours launches HFO-based two-phase cooling fluids," November 2026. coolingpost.com