Zephex® 227ea

Produced to our exacting, industryleading standards, Zephex® 227ea
offers performance characteristics complementary to Zephex® 134a.49211 - Zephex logo_Small It is primarily used to support heavier and denser drug suspensions such as sodium cromoglycate due to its relatively high liquid density of around 1.39 gcm3, whilst its lower affinity for water  also means it offers improved stability when used with chemically labile actives such as formoterol.

 

Zephex® 227ea physical properties

Physical Property Units Data
Chemical Name 1,1,1,2,3,3,3-Heptafluoropropane
Chemical Formula CF3CHFCF3
Molecular Weight 170.03
Boiling Point at 1 atm (1.013 bar) °C
°F
-16.45
2.39
Melting Point °C
°F
-131.2
-204.16
Critical Temperature °C
°F
102.79
217.02
Critical Pressure bara
lb/in² abs
29.87
433.22
Critical Volume m³/kg
ft³/lb
1.72 x 10-³
0.0276
Critical Density kg/m³
lb/ft³
581.4
36.23
Liquid Density at 25°C(77°F) kg/m³
lb/ft³
1387.4
86.46
Vapour Density at 25°C(77°F) kg/m³
lb/ft³
37.05
2.31
Saturated Vapour Density at nBpt kg/m³
lb/ft³
35.94
2.240
Liquid Cp at 25°C(77°F) kJ/kg.K
Btu/lb·°F
0.8769
0.211
Vapour Pressure at 25°C(77°F) bara 4.544
Latent Heat of Vaporisation at nBpt kJ/kg
Btu/lb
132.02
56.76
Liquid Thermal Conductivity at 25°C(77°F) W/m·K
Btu/hr·ft°F
0.054
0.031
Vapour Thermal Conductivity at
25°C(77°F) and 1 atm (1.013 bar)
W/m·K
Btu/hr·ft°F
0.011
0.006
Liquid Viscosity at 25°C(77°F) cP 0.240
Vapour Viscosity at
25°C(77°F) and 1 atm(1.013 bar)
cP 0.010
Coeficient of thermal expansion /°C Not yet available
Solubility of 227ea in Water at 20°C
(68°F) and 1 atm (1.013 bar)
%w/w 0.058
Solubility of Water in 227ea at
25°C(77°F) and 1 atm(1.013 bar)
%w/w 0.061
Flammability Limits in Air at 1 atm
(1.013 bar)
%v/v Non-Flammable
Autoignition Temperature °C
°F
>650
>1200
Liquid Dielectric Constant at 20°C Not yet available
Vapour Dielectric Constant at
25°C(77°F) and 1 atm (1.013 bar)
Not yet available
Dielectric Strength (R12 = 1) Not yet available
Dipole Moment D 1.456 ± 0.002
Thermal Coductivity at 25 °C W/mK 0.054
Surface Tension at 25 °C mN/m 7.50
Toxicity AEL (8- and 12-hr TWA) ppm(v/v) 1000
TSCA Inventory Status Included
EINECS Inventory Status Included