2h-heptafluoropropane
structural formula
| business number | 04t3 |
|---|---|
| molecular formula | c3hf7 |
| molecular weight | 190.03 |
| label |
heptafluoropropane, 1,1,1,2,3,3,3-heptafluoropropane, hydrofluorocarbon 227ea, 1,1,1,2,3,3,3-heptafluoropropane, apaflurane, heptafluoropropane, hfc-227ea, 1,1,1,2,3,3,3-heptafluoropropane, 2h-heptafluoropropane, 1,1,1,2,3,3,3-heptafluoro-propan, 2h-perfluoropropane, 2-hydroheptafluoropropane, 2-hydroperfluoropropane |
numbering system
cas number:431-89-0
mdl number:none
einecs number:207-079-2
rtecs number:none
brn number:none
pubchem id:none
physical property data
一 , physical property data
traits ：at normal temperature and pressure, it is colorless, almost odorless, non-conductive gas
density (g/ml,25/4℃): 1.403
relative vapor density (g/ml, air=1)：not available
melting point (ºc):-131.1
boiling point (ºc, normal pressure): -16.4
boiling point (ºc, 5.2kpa): not available
refraction rate: not available
flash point (ºc): not available
optical rotation (º): not available
spontaneous combustion point or ignition temperature (ºc): not available
steam pressure (kpa, 25ºc): not available
saturated vapor pressure (kpa, 60ºc): not available
burn heat (kj/mol):not available
critical temperature (ºc): not available
critical pressure (kpa): not available
oil and water log value of the (octanol/water) partition coefficient:not available
explosion upper limit (%, v/v): not available
explosion lower limit (%, v/v): not available
dissolve properties: not available
toxicological data
two , toxicological data:
acute toxicity:not available .
ecological data
three , ecological data:
1 , other harmful effects: this substance may be harmful to the environment, and special treatment should be given to water bodies. notice.
molecular structure data
1、 molar refractive index:16.98
2、 molar volume（m3/mol)：116.6
3、 isotonic specific volume (90.2k):205.6
4、 surface tension（dyne/cm)：9.6
5、 polarizability(10-24cm3）： 6.73
compute chemical data
1. reference value for hydrophobic parameter calculation (xlogp): 2.9
2. number of hydrogen bond donors: 0
3. number of hydrogen bond acceptors: 7
4. number of rotatable chemical bonds: 0
5. number of tautomers: none
6. topological molecule polar surface area 0
7. number of heavy atoms: 10
8. surface charge: 0
9. complexity: 93
10. number of isotope atoms: 0
11. determine the number of atomic stereocenters: 0
12. uncertain number of atomic stereocenters: 0
13. determine the number of chemical bond stereocenters: 0
14. number of uncertain chemical bond stereocenters: 0
15. number of covalent bond units: 1
properties and stability
none yet
storage method
none yet
synthesis method
none yet
purpose
due to its high fire-extinguishing efficiency and low toxicity, it is non-destructive to the atmospheric ozone layer and is safe for use there is no contamination at the site, it is believed to be halon1301 an ideal alternative, has been listed by the national fire protection associationnfpa2001 standard for fire-extinguishing supplies. in addition, heptafluoropropane is also used as a refrigerant and medical propellant.