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Ionization Potentials (IPs) of Common Chemicals

Below find a handy reference table featuring compound names, formulas, and ionization potentials for an assortment of gasses and vapors. Use this information as a reference while using our PIDs and FIDs. For introductory information about PIDs check our PID Tutorial. For introductory information about FIDs check our FID Tutorial.

Compound Formula IP
AcetaldehydeCH3CHO10.23
Acetic AcidCH3COOH10.66
Acetic Anhydride(CH3CO)2O10.00
AcetoneCH3COCH39.70
AcetonitrileCH3CN12.20
AcroleinCH2CHCHO10.10
Acrylamide-SkinCH2CHCONH29.50
Acrylonitrile-SkinCH2CHCN10.92
AllylChlorideCH2CHCH2Cl9.90
AllylAlcohol-SkinCH2CHCH2OH9.67
2-amino pyridineC5H6N28.00
AmmoniaNH310.16
Aniline-SkinC6H5NH27.72
Anisidine (O,P, isomers)-SkinNH2C6H4OCH37.46
ArsineAsH39.89
BenzeneC6H69.24
Boron oxideB2O313.50
Boron TrifluorideBF315.56
BromineBr210.51
Bromoform-SkinCHBr310.48
Butadiene,1,3-Butadiene)CH2CHCHCH29.07
2-Butanone (MEK)CH3COCH2CH39.51
2-Butoxyethanol (ButylCellosolve)C4H9OCH2CH2OH10.00
Butyl Acetate (n-Butyl Acetate)CH3COO(CH2)3CH310.00
sec-Butyl AcetateCH3COOCHCH3C2H59.90
n-Butyl AcetateCH3CH2CH2CH2OH10.06
sec-Butyl AlcoholCH3CHOHCH2CH39.88
Butyl Mercaptan CH3CH2CH2CH2SH9.14
p-tert-Butyl tolueneCH3C6H4C4H98.28
Butylamine-SkinC4H9NH28.71
CamphorC10H16O8.76
Carbon Dioxide CO213.77
Carbon Disulfide CS210.07
Carbon MonoxideCO14.01
Carbon Tetra chloride CCl411.47
Chlorine Cl211.48
Chlorine dioxideClO210.36
Chlorine TrifluorideClF312.65
ChloracetaldehydeClCH2CHO10.48
a-Chloracetophenone (Phenacylchloride)C6H5COCH2Cl9.44
Chlorobenzene (monochlorobenzene)C6H5Cl9.06
ChlorobromomethaneCH2BrCl10.77
Chloroform (Trichloromethane)CHCl311.37
1-Chloro-1-nitro-propaneC2H5CHClNO29.90
ChryseneC18H127.59
Cresol (all isomers)-skinCH3C6H4OH(o-)8.14
CrotonaldehydeCH3CHCHCHO9.73
Cumene (Isopropyl Benzene)C6H5C3H78.73
CyclohexaneC6H129.86
CyclohexanolC6H11OH9.75
CyclohexanoneC6H10O9.14
CyclohexeneC6H108.94
CyclopentadieneC5H68.56
Decaborane-skinB10H149.88
DiazomethaneCH2NH29.00
DiboraneB2H611.38
o-DichlorobenzeneC6H4Cl29.06
p-DichlorobenzeneC6H4Cl28.89
Dichlorodifluoromethane (freon 12)CCl2F211.75
1,1-DichloroethaneCH3CHCl211.06
1,2-DichloroethyleneClCHCHCl9.65
Dichloromonofluoromethane (freon 21)CHCl2F11.50
Dichlorotetrafluoroethane (freon 114)F2ClCClF212.20
Diethylamine(C2H5)2NH8.01
Difluorodibromomethane (freon 12B2)CBr2F211.07
Diisobutyl ketone((CH3)2CHCH2)2CO9.04
Diisopropylamine(CH3)2CHNHCH(CH3)27.73
N,N-Dimethylacetamide-skinCH3CON(CH3)28.81
Dimethylamine(CH3)2NH8.23
DimethylanilineC6H5N(CH3)27.13
Dimethylformamide-skinHCON(CH3)29.13
1,1-dimethylhydrazine-skin(CH3)2NNH27.28
DimethylphthalateC10H10O49.64
DinitrobenzeneC6H4(NO2)210.71
Dioxane (Diethylene Dioxide)-skinOCH2CH2OCH2CH29.19
DiphenylC6H5C6H57.95
Epichlorohydrin-skinC3H5OCl10.20
EthanolamineHOCH2CH2NH28.96
Ethyl AcetateCH3COOC2H510.01
Ethyl Acrylate-skinCH2CHCOOC2H510.30
Ethyl Alcohol (Ethanol)C2H5OH10.47
Ethyl ChlorideC2H5Cl10.97
Ethyl EtherC2H5OC2H59.51
Ethyl FormateHCOOC2H510.61
Ethyl MercaptanC2H5SH9.29
Ethyl Silicate(C2H5)4SiO49.77
EthylamineC2H5NH28.86
Ethylene Chlorohydrin-skinCH2ClCH2OH10.52
Ethylene Dibromide (1,2-Dibromoethane)CH2BrCH2Br10.37
Ethylene Dichloride (1,2-Dichloroethane)ClCH2CH2Cl11.05
Ethylene oxideC2H4O10.56
EthylenediamineNH2CH2CH2NH28.60
EthylenelmineC2H5N9.20
Ferbam((CH3)2NCS2)3Fe7.72
FluorineF215.70
Fluorotrichloromethane (freon 11)CCl3F11.77
FormaldehydeHCHO10.88
Formic AcidHCOOH11.33
Furfural-skinC4H3OCHO9.21
Heptane (n-Heptane)C7H169.92
HexachloroethaneCCl3CCl311.10
Hexane (n-Hexane)C6H1410.13
2-HexanoneCH3CO(CH2)3CH39.35
Hexone (Methyl isobutyl ketone)CH3COCH2C3H79.30
Hydrazine-skinN2H48.10
Hydrogen BromideHBr11.66
Hydrogen ChlorideHCl12.72
Hydrogen Cyanide-skinHCN13.60
Hydrogen FluorideHF16.04
Hydrogen Peroxide 90H2O210.54
Hydrogen SelenideH2Se9.88
Hydrogen SulfideH2S10.46
HydroquinoneC6H6O27.95
Iodinel29.39
Isobutyl Alcohol(CH3)2CHCH2OH10.12
IsophoroneC9H14O9.07
Isopropyl AcetateCH3COOCH(CH3)29.99
Isopropyl Alcohol CH3CHOHCH310.12
Isopropyl Ether((CH3)2CH)2O9.20
Isopropylamine(CH3)2CHNH28.72
KeteneCH2CO9.61
Maleic Anhydride(CHCO)2O10.80
Mesityl oxideCH3COCH5C(CH2)29.08
Methyl AcetateCH3COOCH310.27
Methyl Acetylene-(Propyne)C3H410.37
Methyl Acrylate CH2CHCOOCH39.90
Methyl AlcoholCH3OH10.85
Methyl n-Amyl Ketone (2-Heptanone)CH3COC5H119.30
Methyl Bromide CH3Br10.54
Methyl Cellosolve CH3OCH2CH2OH9.60
Methyl ChlorideCH3Cl11.22
Methyl ChloroformCH3CCl311.00
Methyl FormateHCOOCH310.81
Methyl Iodide-skinCH3l9.52
Methyl IsocyanateCH3NCO10.67
Methyl MercaptanCH3SH9.44
Methyl MethacrylateCH2C(CH3)COOCH39.70
Methyl StyreneC6H5C(CH3)CH28.19
Methylal (dimethoxy-methane)CH3OCH2OCH39.50
Methylamine CH3NH28.97
MethylcyclohexaneCH3C6H119.64
MethylcyclohexanolCH3C6H10OH9.80
Methylene ChlorideCH2Cl211.32
MonomethylanilineC6H5NHCH37.33
Monomethyl hydrazine-skinCH3NHNH27.67
Morpholine-skinC4H9ON8.20
NaphthaleneC10H88.14
Nickel CarbonylNi(CO)48.27
Nitric AcidHNO311.95
Nitric Oxide (NO)NO9.26
Nitrobenzene C6H5NO29.86
Nitroethane C2H5NO210.88
p-Nitrochloro benzeneClC6H4NO29.96
Nitrogen DioxideNO2 and N2O49.75
Nitrogen TrifluorideNF312.97
NitromethaneCH3NO211.04
1-NitropropaneCH3CH2CH2NO210.81
2-Nitropropane(CH3)2CHNO210.71
Nitrotoluene-skinNO2C6H4CH39.45
OctaneC8H139.82
Oxygen DifluorideOF213.11
OzoneO312.43
PentaboraneB5H99.90
PentaneC5H1210.35
PentanoneCH3COC3H79.38
PerchloroethyleneC2Cl49.32
Perchloryl FluorideClO3F12.94
Phenol-skinC6H5OH8.47
Phenylether (vapor)(C6H5)2O8.09
p-Phenylene diamine-skinC6H8N26.89
Phenylhydrazine-skinC6H5NHNH28.00
Phosgene (Carbonyl Chloride)COCl211.40
Phosphine PH39.87
Phosphorus TrichloridePCl39.91
Phthalic AnhydrideC6H4(CO)2O10.00
PropaneCH3CH2CH310.95
Propargyl AlcoholHCCCH2OH10.51
n-propyl AcetateCH3COOCH2CH310.04
Propyl AlcoholCH3CH2CH2OH10.22
n-propyl nitrateC3H7NO311.07
Propylene DichlorideCH3CHClCH2Cl10.87
Propylene Imine-skinC3H7N9.00
Propylene oxideCH3CHOCH210.26
PyridineC5H5N9.25
Quinone OC6H4010.04
StibineSbH39.51
StyreneC6H5CHCH28.40
Sulfur dioxideSO212.30
Sulfur HexafluorideSF615.33
Sulfur MonochlorideS2Cl29.66
Sulfuryl FluorideSO2F213.00
o-TerphenylsCl8H147.78
1,1,2,2-tetrachloro-1,2-difluoroethane (freon 112)CCl2FCCl2F11.30
1,1,2,2-Tetrachloroethane-skinCHCl2CHCl211.62
Tetra Ethyl lead-skinPb(C2H5)411.10
TetrahydrofuranC4H8O9.41
Tetramethyl lead-skinPb(CH3)48.50
TolueneC6H5CH38.82
o-Toluidine-skinCH3C6H4NH27.44
1,1,2-trichloroethane-skinCHCl2CH2Cl11.00
TrichloroethyleneCHClCCl29.47
1,1,2-Trichloro-1,2,2-Triflouroethane (freon 113)CCl2FCClF211.89
Triethylamine(C2H5)3N7.50
Trifluoromonobromo-methane (freon 13B1)CBrF311.40
Trinitrotoluene (TNT)-skinCH3C6H2(NO2)310.59
Vinyl chloride C2H3Cl9.99
o-Vinyl tolueneCH3C6H4CHCH28.20
1,2-Xylene (Xylol)C6H4(CH3)28.45
2,4-Xylidine-skin(CH3)2C6H3NH27.65

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