Volatile Organic Compounds and other gases: A-B  C-D  E-H  I-O  P-Z 

GAS OR VAPOR	Ionization Potential(eV)
P
1-Pentene	9.5
1-Propanethiol	9.2
2,4-Pentanedione	8.87
2-Pentanone	9.38
2-Picoline	9.02
3-Picoline	9.02
4-Picoline	9.04
n-Propyl nitrate	11.07
Pentaborane	10.4
Pentane	10.35
Perchloroethylene	9.32
Pheneloic	8.18
Phenol	8.5
Phenyl ether (diphenyl oxide)	8.82
Phenyl hydrazine	7.64
Phenyl isocyanate	8.77
Phenyl isothiocyanate	8.52
Phenylene diamine	6.89
Phosgene	11.77
Phosphine	9.87
Phosphorus trichloride	9.91
Phthalic anhydride	10
Propane	11.07
Propargyl alcohol	10.51
Propiolactone	9.7
Propionaldehyde	9.98
Propionic acid	10.24
Propionitrile	11.84
Propyl acetate	10.04
Propyl alcohol	10.2
Propyl amine	8.78
Propyl benzene	8.72
Propyl ether	9.27
Propyl formate	10.54
Propylene	9.73
Propylene dichloride	10.87
Propylene imine	9
Propylene oxide	10.22
Propyne	10.36
Pyridine	9.32
Pyrrole	8.2
Q
Quinone	10.04
S
Stibine	9.51
Styrene	8.47
Sulfur dioxide	12.3
Sulfur hexafluoride	15.33
Sulfur monochloride	9.66
Sulfuryl fluoride	13
T
o-Terphenyls	7.78
1,1,2,2-Tetrachloro-1,2- difluoroethane (Freon 112)	11.3
1,1,1-Trichloroethane	11
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)	11.78
2,2,4-Trimethyl pentane	9.86
o-Toluidine	7.44
Tetrachloroethane	11.62
Tetrachloroethene	9.32
Tetrachloromethane	11.47
Tetrahydrofuran	9.54
Tetrahydropyran	9.25
Thiolacetic acid	10
Thiophene	8.86
Toluene	8.82
Tribromoethene	9.27
Tribromofluoromethane	10.67
Tribromomethane	10.51
Trichloroethene	9.45
Trichloroethylene	9.47
Trichlorofluoromethane (Freon 11)	11.77
Trichloromethane	11.42
Triethylamine	7.5
Trifluoromonobromo-methane	11.4
Trimethyl amine	7.82
Tripropyl amine	7.23
V
o-Vinyl toluene	8.2
Valeraldehyde	9.82
Valeric acid	10.12
Vinyl acetate	9.19
Vinyl bromide	9.8
Vinyl chloride	10
Vinyl methyl ether	8.93
W
Water 1	2.59
X
2,4-Xylidine	7.65
m-Xylene	8.56
o-Xylene	8.56
p-Xylene	8.45