Zephex® 227ea
Produced to our exacting, industryleading standards, Zephex® 227ea
offers performance characteristics complementary to Zephex® 134a.
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 |