XL40R-454AOpteon™ XL40 (R-454A) is a mildly flammable refrigerantwith low global warming potential (GWP) for replacementof R-404A in new equipment designs. Opteon™ XL40 is alow GWP hydrofluoro-olefin (HFO) based refrigerant withthe optimal balance of properties to replace R-404A in
positive displacement, direct expansion low- and medium
temperature commercial and industrial applications.
Opteon™ XL40 offers improved energy performanceand higher cooling capacities which makes it easy andBenefits• Low GWP (94 % reduction versus R-404A) ; zero ozone1)

depletion• Improved capacity and efficiency compared to R-404A• Very close match to R-404A – easily convertible fromcurrent design with minimal equipment sizing differences
relative to legacy HFC/HCFC designs• Can be topped off after leaks• ASHRAE A2L safety classification• Compatible with POE lubricantscost-effective to apply in new equipment without major
modifications. Classified as mildly flammable (ISO/ASHRAEClass 2L), Opteon™ XL40 allows much higher charge sizes
than other more highly flammable refrigerants and can besafely used by following the applicable codes and standards.
Since Opteon™ XL40 is a mildly flammable class 2L
refrigerant, please check your local regulations andStandards such as EN378, UL 60335-2-89 and ISO5149
to verify the allowable filling charge and new equipment
design and safe handling requirements for theintended application.

Applications
Low- and Medium temperature commercial and industrial
refrigeration designed for R-404A• Supermarkets– Distributed systems– Walk-in coolers/freezers, prep rooms, etc.
• Condensing units (e.g. in food service)• Cold stores

Opteon™ XL40 properties
ASHRAE Number

R-454A

Composition
Weight %R-32/R-1234yf
35.0/65.0

Molecular Weight80.5 g/mol

Normal Boiling Point¹-47.8 °C (-54.1 °F)

Critical Pressure

4627.3 kPa (671.1 psia)

Critical Temperature
Liquid Density at 21.1 °C (70 °F)

81.7 °C (179.1 °F)
1037.2 kg/m³ (64.7 lb/ft³)

Ozone Depletion Potential(CFC-11 = 1.0)0AR4 (AR5) GWP (CO2 = 1.0)

238 (239)

ASHRAE Safety Classification

A2L

Temperature Glide~5 K (~9 R)

Lower Flammability Limit²8.4 vol%¹ Normal bubble point² ASHRAE Standard 34 - 2022 Addendum A

Opteon™ XL40

Thermodynamic Performance

The tables below summarize the thermodynamic cycle performance of R-454A relative to R-404A at standard low andmedium temperature refrigeration conditions.
*Low Temperature Model Conditions:40.5 °C (105 °F) Cond, -28.8 °C (-20 °F) Evap, 16.6 K (30 R) Superheat, 5.5 K (10 R) Subcool, 75% efficiency
Refrigerant

Relative Capacity

Relative COP

Relative Mass
Flow RateSuction PressurekPa (psia)

Discharge PressurekPa (psia)

Discharge Temperature°C (°F)

R-404A

1.00

1.00

1.00

213.1 (30.9)

1846.4 (267.8)

78.4 (173.1)

R-454A

1.07

1.05

0.72

202.0 (29.3)

1865.7 (270.6)

99.4 (211.0)*Evap and Cond temp are in mid-point

Medium temperature Model Conditions:40.5 °C (105 °F) Cond, -6.7 °C (20 °F) Evap, 16.6 K (30 R) Superheat, 5.5 K (10 R) Subcool, 75% efficiency
Refrigerant

Relative Capacity

Relative COP

Relative Mass
Flow Rate

Suction PressurekPa (psia)

Discharge PressurekPa (psia)

Discharge Temperature°C (°F)

R-404A

1.00

1.00

1.00

486.1 (70.5)

1846.4 (267.8)

69.3 (156.8)

R-454A

1.06

1.03

0.74

471.6 (68.4)

1865.7 (270.6)

83.0 (181.4)*Evap and Cond temp are in mid-point

For more information on the Opteon™ family of refrigerants or otherrefrigerants from Chemours, visit opteon.com
For refrigerant related support, contact our Tech2Tech Support Team

866-433-TECH (8324), or email tech2tech@chemours.com

2024
C-11000 (1/2024)