Propellant
Solstice® Propellant
A climate-friendly alternative to HFCs and HCFCs, our Solstice® propellant offers performance similar to HFC-134a, and is a near drop-in replacement with only minimal changes required to formulations and equipment.
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Overview
A climate-friendly alternative to HFCs and HCFCs, our Solstice® propellant offers performance similar to HFC-134a, and is a near drop-in replacement with only minimal changes required to formulations and equipment. With our low GWP propellant, aerosols are back in favor.
Typical Properties
General Information
- Application
- Propellant
- Spray foam Insulation
- ASHRAE Number
- 34
- Brand
- Solstice®
- Linear Formula
- CF3CH=CHF
- Synonyms
- HFO-1234ze (E), 1234ze(E), trans-1234ze
- Other Notes
- performance similar to HFC-134a
Physical Properties
- Expansion Ratio
- 247 at 1 ATM and 60 °F (15.6 °C) (Liquid to Gas)
- Heat of Gas
- 0.224 Cp at 15.6 °C, cal/g
- 0.224 Cp at 60 °F, BTU/lb
- Heat of Vaporization
- 195 KJ/g at BP
- 84 BTU/lb at BP
- Kauri-Butanol Value
- 12.5
- Liquid Density
- 1.17 grams/cc at 21.1 °C
- 9.96 lb/gal at 60 °F
- Liquid Expansion Coefficient
- 0.0017 at 60 °F (15.6 °C)
- Liquid Viscosity
- 0.171 cP at 100 °F (37.8 °C)
- Molecular Weight
- 114
- Solubility in Water
- 0.037 at 70 °F (21.1 °C)
- Specific Gravity
- 3.958 at 60 °F (15.5 °C)
- Specific Heat of Liquid
- 0.323 BTU/lb at 60 °F, at Cp
- 0.323 cal/g at 15.6 °C, at Cp
- Surface Tension
- 8.95
- Theoretical Heat of Combustion
- 10.1 KJ/g at 70 °F (21.1 °C)
- 4359 BTU/lb at 70 °F (21.1 °C)
- Vapor Pressure
- 10.1 bar g at 54.4 °C
- 147 psig at 130 °F
- 3.4 bar g at 21.1 °C
- 49.5 psig at 70 °F
- 6.2 bar g at 37.8 °C
- 89.9 psig at 100 °F
- Vapor Volume
- 0.25 per liter of liquid at 16.6 °C, m3
- 33.02 per gal of liquid at 60 °F, ft3
Temperature
- Autoignition Temperature
- 368 °C
- 694 °F
- Boiling Point/Range
- -19 °C at 1 ATM
- -2.2 °F at 1 ATM
- Flashpoint
- Non-Flammable
Standards & Approvals
- ASHRAE Safety Classification
- A2L
General Information
- Application
- Propellant
- Spray foam Insulation
- ASHRAE Number
- 34
- Brand
- Solstice®
- Linear Formula
- CF3CH=CHF
- Synonyms
- HFO-1234ze (E), 1234ze(E), trans-1234ze
- Other Notes
- performance similar to HFC-134a
Physical Properties
- Expansion Ratio
- 247 at 1 ATM and 60 °F (15.6 °C) (Liquid to Gas)
- Heat of Gas
- 0.224 Cp at 15.6 °C, cal/g
- 0.224 Cp at 60 °F, BTU/lb
- Heat of Vaporization
- 195 KJ/g at BP
- 84 BTU/lb at BP
- Kauri-Butanol Value
- 12.5
- Liquid Density
- 1.17 grams/cc at 21.1 °C
- 9.96 lb/gal at 60 °F
- Liquid Expansion Coefficient
- 0.0017 at 60 °F (15.6 °C)
- Liquid Viscosity
- 0.171 cP at 100 °F (37.8 °C)
- Molecular Weight
- 114
- Solubility in Water
- 0.037 at 70 °F (21.1 °C)
- Specific Gravity
- 3.958 at 60 °F (15.5 °C)
- Specific Heat of Liquid
- 0.323 BTU/lb at 60 °F, at Cp
- 0.323 cal/g at 15.6 °C, at Cp
- Surface Tension
- 8.95
- Theoretical Heat of Combustion
- 10.1 KJ/g at 70 °F (21.1 °C)
- 4359 BTU/lb at 70 °F (21.1 °C)
- Vapor Pressure
- 10.1 bar g at 54.4 °C
- 147 psig at 130 °F
- 3.4 bar g at 21.1 °C
- 49.5 psig at 70 °F
- 6.2 bar g at 37.8 °C
- 89.9 psig at 100 °F
- Vapor Volume
- 0.25 per liter of liquid at 16.6 °C, m3
- 33.02 per gal of liquid at 60 °F, ft3
Temperature
- Autoignition Temperature
- 368 °C
- 694 °F
- Boiling Point/Range
- -19 °C at 1 ATM
- -2.2 °F at 1 ATM
- Flashpoint
- Non-Flammable
Standards & Approvals
- ASHRAE Safety Classification
- A2L
- Brand : Solstice®
- Linear Formula : CF3CH=CHF
- ASHRAE Number : 34
- Other Notes : performance similar to HFC-134a
- Application : Propellant|Spray foam Insulation
- Synonyms : HFO-1234ze (E), 1234ze(E), trans-1234ze
- Theoretical Heat of Combustion : 10.1 KJ/g at 70 °F (21.1 °C)|4359 BTU/lb at 70 °F (21.1 °C)
- Liquid Expansion Coefficient : 0.0017 at 60 °F (15.6 °C)
- Specific Heat of Liquid : 0.323 BTU/lb at 60 °F, at Cp|0.323 cal/g at 15.6 °C, at Cp
- Heat of Vaporization : 195 KJ/g at BP|84 BTU/lb at BP
- Solubility in Water : 0.037 at 70 °F (21.1 °C)
- Kauri-Butanol Value : 12.5
- Specific Gravity : 3.958 at 60 °F (15.5 °C)
- Molecular Weight : 114
- Liquid Viscosity : 0.171 cP at 100 °F (37.8 °C)
- Surface Tension : 8.95
- Expansion Ratio : 247 at 1 ATM and 60 °F (15.6 °C) (Liquid to Gas)
- Vapor Pressure : 10.1 bar g at 54.4 °C|147 psig at 130 °F|3.4 bar g at 21.1 °C|49.5 psig at 70 °F|6.2 bar g at 37.8 °C|89.9 psig at 100 °F
- Liquid Density : 1.17 grams/cc at 21.1 °C|9.96 lb/gal at 60 °F
- Vapor Volume : 0.25 per liter of liquid at 16.6 °C, m3|33.02 per gal of liquid at 60 °F, ft3
- Heat of Gas : 0.224 Cp at 15.6 °C, cal/g|0.224 Cp at 60 °F, BTU/lb
- Autoignition Temperature : 368 °C|694 °F
- Boiling Point/Range : -19 °C at 1 ATM|-2.2 °F at 1 ATM
- Flashpoint : Non-Flammable
- ASHRAE Safety Classification : A2L
Technical Note
Name
Description
File Size
Date
Size
Flammability Assessment
application/pdf 107.65 KB
6/29/2026
107.65 KB
Comparison with Common Propellants
application/pdf 143.92 KB
6/29/2026
143.92 KB
Using Solstice® Enhance and Propellant
application/pdf 187.63 KB
6/29/2026
187.63 KB
Using Solstice® Enhance and Propellant
application/pdf 149.17 KB
6/29/2026
149.17 KB
Using Solstice® Enhance and Propellant
application/pdf 291.89 KB
6/29/2026
291.89 KB
Brochure
Name
Description
File Size
Date
Size
Data Sheet
Name
Description
File Size
Date
Size
Infographic
Name
Description
File Size
Date
Size
Using Solstice® Enhance and Propellant
application/pdf 74.24 KB
6/29/2026
74.24 KB
Name
Description
File Size
Date
Size
Flammability Assessment
application/pdf 107.65 KB
6/29/2026
107.65 KB
Comparison with Common Propellants
application/pdf 143.92 KB
6/29/2026
143.92 KB
Using Solstice® Enhance and Propellant
application/pdf 187.63 KB
6/29/2026
187.63 KB
Using Solstice® Enhance and Propellant
application/pdf 149.17 KB
6/29/2026
149.17 KB
Using Solstice® Enhance and Propellant
application/pdf 74.24 KB
6/29/2026
74.24 KB
Using Solstice® Enhance and Propellant
application/pdf 291.89 KB
6/29/2026
291.89 KB
Name
Description
File Size
Date
Size
Flammability Assessment
107.65 KB
6/29/2026
Using Solstice® Enhance and Propellant
74.24 KB
6/29/2026
