Organic sulfur compounds - physical data

Boiling and melting points of thoils, sulfides, disulfides and thiophenes shown together with molecular structures, as well as molweights and density.

The figures below show the boiling and melting point for organic sulfur compounds as sulfides, disulfides, thiols (mercaptans) and thiophenes, together with the molecular structures of the different compounds. The table shows the same numbers together with the molecular weight and density, as well as the numbers of carbon, hydrogen and sulfur in the molecules. All numbers are given for boiling and melting at 1 atm (760 mm Hg). For some compounds the boiling point at 1 atm is not available. For these, the 1 atm boiling point is estimated from low pressure measurements, using a vaporization heat of 54- 70 kJ/mol (increasing with increasing BP).  It is not known whether these compounds are stable at the 1 atm boiling temperature or not.  Definitions of the organic classes are given below the figures.

  • Boiling point - the temperature at which a liquid turns into a gas
  • Melting point - the temperature at which a solid turns into a liquid

See also similar figures and tables for organic nitrogen compounds  and boiling and melting point of hydrocarbons, alcohols and acids, as well as densities of organic sulfur compounds.

Boiling and melting points of linear sulfides

Boiling and melting point of disulfides




Boiling and melting points of branched and phenyl sulfides




Boiling and melting point of thiophenes




Thiols sulfides and disulfides boiling point




Thiols sulfides and disulfides melting point





GroupCompound nameCommon name #C #H #S Molweight
[g/mol]
Melting point
[°C]
Boiling point
[°C]
Density @20°C
[g/ml]
1-Thiol Methanethiol Methyl mercaptan 1 4 1 48.11 -123 6 0.866
1-Thiol Ethanethiol Ethyl mercaptan 2 6 1 62.13 -148 35 0.835
1-Thiol 1-Propanethiol Propyl mercaptan 3 8 1 76.16 -113 68 0.841
1-Thiol 1-Butanethiol Butyl mercaptan 4 10 1 90.19 -116 98 0.842
1-Thiol 1-Pentanethiol Pentyl mercaptan 5 12 1 104.21 -76 127 0.844
1-Thiol 1-Hexanethiol Hexyl mercaptan 6 14 1 118.24 -81 153 0.842
1-Thiol 1-Heptanethiol Heptyl mercaptan 7 16 1 132.27 -43 177 0.843
1-Thiol 1-Octanethiol Octyl mercaptan 8 18 1 146.29 -49 199 0.843
1-Thiol 1-Nonanethiol Nonyl mercaptan 9 20 1 160.32 -20 220 0.846
1-Thiol 1-Decanethiol Decyl mercaptan 10 22 1 174.35 -25 240 0.844
1-Thiol 1-Undecanethiol Undecyl mercaptan 11 24 1 188.37 -2 257 0.845
1-Thiol 1-Dodecanethiol Dodecyl mercaptan 12 26 1 202.40 -7 277 0.844
1-Thiol 1-Tetradecanethiol Tetradecyl mercaptan 14 30 1 230.45 7 309* 0.850
1-Thiol 1-Hexadecanethiol Cetyl mercaptan 16 34 1 258.51 19 350*
Branched thiol 2-Propanethiol Isopropyl mercaptan 3 8 1 76.16 -131 53 0.814
Branched thiol 2-Butanethiol sec-Butyl mercaptan 4 10 1 90.19 -165 85 0.830
Branched thiol 2-Pentanethiol sec-Pentyl mercaptan 5 12 1 104.21 -169 113 0.833
Branched thiol 3-Pentanethiol 3-Pentyl mercaptan 5 12 1 104.21 -111 116 0.841
Branched thiol Benzenethiol Phenyl mercaptan 6 6 1 110.18 -15 169 1.078
Branched thiol 2-Hexanethiol 7 8 1 118.24 -147 139 0.835
Linear sulfide Dimethyl sulfide 2-Thiapropane 2 6 1 62.13 -98 37 0.848
Linear sulfide Ethyl methyl sulfide 3 8 1 76.16 -106 67 0.842
Linear sulfide Diethyl sulfide Ethyl sulfide 4 10 1 90.19 -104 92 0.836
Linear sulfide Methyl propyl sulfide 4 10 1 90.19 -113 96 0.842
Linear sulfide Ethyl propyl sulfide 5 12 1 104.21 -117 119 0.837
Linear sulfide Butyl methyl sulfide 5 12 1 104.21 -98 123 0.843
Linear sulfide Dipropylsulfide 6 14 1 118.24 -103 143 0.838
Linear sulfide Butyl ethyl sulfide 6 14 1 118.24 -95 144 0.838
Linear sulfide Methyl pentyl sulfide 6 14 1 118.24 -94 148 0.843
Linear sulfide Dibutyl sulfide Butyl sulfide 8 18 1 146.29 -75 188 0.839
Linear sulfide Ethyl 1-octyl sulfide 1-(Ethylthio)octane 10 22 1 174.35 225*
Linear sulfide Dipentyl sulfide 10 22 1 174.35 -51 229 0.841
Linear sulfide Dihexyl sulfide Hexyl sulfide 12 26 1 202.40 260 0.841
Linear sulfide Diheptyl sulfide Heptyl sulfide 14 30 1 230.45 -11 298 0.842
Linear sulfide Dioctyl sulfide Octyl sulfide 16 34 1 258.51 -1 338* 0.844
Branched sulfide Isopropyl methyl sulfide 4 10 1 90.19 -101 85 0.829
Branched sulfide Tert-butyl methyl sulfide 5 12 1 104.21 99 0.830
Branched sulfide Ethyl isopropyl sulfide 5 12 1 104.21 -122 107 0.825
Branched sulfide Diallyl sulfide 6 10 1 114.21 -85 138 0.893
Branched sulfide Diisopropyl sulfid 6 14 1 118.24 -78 120 0.814
Branched sulfide Tert-butyl ethyl sulfide 6 14 1 118.24 -86 120 0.820
Branched sulfide Isopropyl propyl sulfid 6 14 1 118.24 132 0.827
Branched sulfide Methyl tert-pentyl sulfide 6 14 1 118.24 150 0.840
Branched sulfide Methyl phenyl sulfide Methyl thiobenzene, Thianisole 7 8 1 124.20 -15 188 1.057
Branched sulfide Phenyl vinyl sulfide (Phenylthio)ethylene 8 8 1 136.21 180 1.044
Branched sulfide Ethyl phenyl sulfide Ethyl thiobenzene 8 10 1 138.23 204 1.023
Branched sulfide Di-tert-butyl sulfide 8 18 1 146.29 -9 152 0.819
Branched sulfide Di-sec-butyl sulfide 8 18 1 146.29 167 0.835
Branched sulfide Diisobutyl sulfid 8 18 1 146.29 -106 173 0.829
Branched sulfide Allyl phenyl sulfide 9 10 1 150.24 224 1.024
Branched sulfide Diisopentyl sulfid 10 22 1 174.35 -75 211 0.832
Branched sulfide Diphenyl sulfide Phenyl sulfide 12 10 1 186.27 -15 294 1.114
Branched sulfide Dibenzyl sulfide Benzyl sulfide 14 14 1 214.33 48 335 1.058
Disulfid Dimethyl disulfide DMDS 2 6 2 94.20 -85 110 1.063
Disulfid Diethyl disulfide 4 10 2 122.25 -102 154 0.993
Disulfid Diallyl disulfide DADS Garlicin 6 10 2 146.27 180 1.010
Disulfid Diisopropyl disulfid 6 14 2 150.31 -69 177 0.944
Disulfid Dipentyl disulfide 10 22 2 206.41
Disulfid Dihexyl disulfide 12 26 2 234.46
Disulfid Diheptyl disulfide 14 30 2 262.52
Disulfid Dioctyl disulfide 16 34 2 290.57
Disulfid Dipropyl disulfide 6 14 2 150.31 -85 196 0.960
Disulfid Di-tert-butyl disulfide 8 18 2 178.36 -3 180* 0.923
Disulfid Dibutyl disulfide 8 18 2 178.36 236 0.938
Disulfid Di-phenyl disulfide 12 10 2 218.34 60 310 1.353
Disulfid Di-cyclohexan disulfide 12 22 2 230.43 340* 1.049
Disulfid Di-2-napthyl disulfide 20 14 2 318.46 139 1.144
Thiophene Thiophene Thiofurane 4 4 1 84.14 -38 84 1.065
Thiophene 2,3-Dihydrothiopene 4 6 1 86.16 112
Thiophene 2,5-Dihydrothiopene 4 6 1 86.16 122
Thiophene Tetrahydrothiophene Thiolane, Thiophane, Thiacyclopentane 4 8 1 88.17 -96 121 0.999
Thiophene 2-Methylthiophene 5 6 1 98.17 -63 113 1.019
Thiophene 3-Methylthiophene 5 6 1 98.17 -69 115 1.022
Thiophene 2,5-Dimethtylthiophene 6 8 1 112.19 134 0.987
Thiophene 2-Ethylthiophene 6 8 1 112.19 76 136 0.993
Thiophene 2,3-Dimethtylthiophene 6 8 1 112.19 -49 142 1.007
Thiophene Tetrahydro-2,5-dimethyl-thiophene 6 12 1 116.22 -89 143 0.922
Thiophene 2-Propylthiophene 7 10 1 126.22 158 0.984
Thiophene Benzothiophene Thianaphthene 8 6 1 134.20 31 221 1.156
Thiophene 3-Methylbenzothiophene 8 6 1 134.20 233* 1.108
Thiophene 2-Butylthiophene 8 12 1 140.25 179 0.954
Thiophene 2-Methylbenzo[b]thiophene 2-Methylthianaphthene 9 8 1 148.22 49
Thiophene 2-Phenylthiophene 10 8 1 160.24 35 256
Thiophene Dibenzothiophene 12 8 1 184.26 99 332 1.252
Thiophene 4-Methyldibenzothiophene 13 10 1 198.28 65 298
Thiophene 4,6-Dimethyldibenzothiophene 14 12 1 212.31 153
Thiophene Benzonaphtho[2,1-d]thiophene 16 10 1 234.32 189
Thiophene 4,6-Diethyldibenzothiophene 16 16 1 240.36 49
* Values estimated for 1 atm from low pressure measurements




Definition of organic compounds

Hydrocarbon: An organic compound consisting entirely of hydrogen and carbon.

Alkane: An acyclic saturated hydrocarbon, with the general formula CnH2n+2. Also called paraffin.

Alkyl: An alkyl group is an alkane substituent missing one hydrogen, with general formula CnH2n+1

Phenyl: An phenyl group is a benzene substituent missing one hydrogen, with general formula C6H5.

Organic sulfur compounds:

Thiol: An organosulfur compound that contains a carbon-bonded sulfhydryl group (-SH), with the general formula R–SH (where R represents an alkyl or other organic substituent). For thiols in this document the R represents an alkyl group, and in a 1-thiol the -SH group is located at the end of the alkyl chain. In a 2-thiol and a 3-thiol the -SH group is located at the second and third carbon atom in the alkyl chain, respectively. Also called mercaptan.

Sulfide: An organic compound of the form R’–S–R’’ (where R’ and R’’ represents an alkyl or other organic substituent).

Dialkyl sulfide: A sulphide where R’ and R’’ are linear alkyl groups, and of the same length.

Methyl alkyl sulfide: A sulphide where R’ is a methyl group and R’’ are any alkyl group.

Ethyl alkyl sulfide: A sulphide where R’ is an ethyl group and R’’ are any alkyl group.

Isopropyl alkyl sulphide: A sulphide where R’ is an isopropyl group and R’’ are any alkyl group.

Diisoalkyl sulphide: A sulphide where R’ and R’’ are isoalkyl groups, and of the same length.

Disulfide: An organic compound of the form R’–S-S–R’’ (where R’ and R’’ represents an alkyl or other organic substituent).

Thiophene: A heterocyclic compound with the formula C4H4S. Consisting of a stable, flat five-membered ring.

Alkylthiophene: A monosubstituted thiophene with one branching via the attachment of one alkyl group on one carbon of the thiophene ring, with the general formula CnH(2n+1)C4H3S

Benzothiophene: A polycyclic aromatic compound consisting of a benzene ring connected to a thiophene ring, with the formula C8H6S.

Related Topics

  • Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more
  • Melting point - freezing point - Documents giving melting or freezing point of elements and different kind of chemical species at varying conditions
  • Boiling point - Documents giving boiling point of elements and different kind of chemical species at varying conditions

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