This page provides supplementary chemical data on p-xylene.
Additional recommended knowledge
Material Safety Data Sheet
Structure and properties
Thermodynamic properties
| Phase behavior
|
| Triple point
| 286.3 K (13.15 °C), ? Pa
|
| Critical point
| 617 K (344 °C), 3500 kPa
|
Std enthalpy change
of fusion, ΔfusHo
| 17.1 kJ/mol
|
Std entropy change
of fusion, ΔfusSo
| 59.8 J/(mol·K)
|
Std enthalpy change
of vaporization, ΔvapHo
| 35.7 kJ/mol at 138°C
|
Std entropy change
of vaporization, ΔvapSo
| ? J/(mol·K)
|
| Solid properties
|
Std enthalpy change
of formation, ΔfHosolid
| ? kJ/mol
|
Standard molar entropy,
Sosolid
| ? J/(mol K)
|
| Heat capacity, cp
| ? J/(mol K)
|
| Liquid properties
|
Std enthalpy change
of formation, ΔfHoliquid
| –24.4 kJ/mol
|
Standard molar entropy,
Soliquid
| 247 J/(mol K)
|
Enthalpy of combustion, ΔcHo
| –4552 kJ/mol
|
| Heat capacity, cp
| 181.7 J/(mol K)
|
| Gas properties
|
Std enthalpy change
of formation, ΔfHogas
| 179.6 kJ/mol[3] at 25°C
|
Standard molar entropy,
Sogas
| ? J/(mol K)
|
| Heat capacity, cp
| 163.2 J/(mol K) at 120°C
|
| van der Waals' constants[4]
| a = 3134 L2 kPa/mol2
b = 0.1809 liter per mole
|
Vapor pressure of liquid
| P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760
|
| T in °C | –8.1 | 27.3 | 54.4 | 75.9 | 115.9 | 138.3
|
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
Distillation data
Vapor-liquid Equilibrium
for p-Xylene/o-Xylene[5]
P = 26.66 kPa
|
BP
Temp.
°C
| % by mole p-xylene
|
| liquid | vapor
|
| 100.1 | 0.0 | 0.0
|
| 99.8 | 4.9 | 5.8
|
| 99.5 | 9.9 | 11.8
|
| 99.0 | 17.4 | 20.7
|
| 98.5 | 25.1 | 29.3
|
| 98.1 | 32.6 | 37.1
|
| 97.6 | 40.6 | 44.9
|
| 97.2 | 48.6 | 53.8
|
| 96.7 | 56.9 | 61.8
|
| 96.2 | 64.9 | 69.6
|
| 95.8 | 73.1 | 77.3
|
| 95.4 | 81.4 | 84.5
|
| 94.9 | 90.7 | 91.6
|
| 94.6 | 95.4 | 96.0
|
| 94.4 | 100.0 | 100.0
|
|
|
Vapor-liquid Equilibrium
for p-Xylene/m-Xylene[5]
P = 26.66 kPa
|
BP
Temp.
°C
| % by mole p-xylene
|
| liquid | vapor
|
| 95.30 | 0.0 | 0.0
|
| 95.20 | 8.3 | 8.5
|
| 95.15 | 15.5 | 15.8
|
| 95.05 | 24.3 | 24.9
|
| 95.00 | 33.0 | 33.6
|
| 94.90 | 40.9 | 41.7
|
| 94.85 | 49.0 | 49.7
|
| 94.75 | 57.1 | 57.9
|
| 94.70 | 65.3 | 66.1
|
| 94.60 | 73.8 | 74.3
|
| 94.55 | 81.7 | 82.2
|
| 94.50 | 89.5 | 89.9
|
| 94.45 | 94.8 | 94.8
|
| 94.40 | 100.0 | 100.0
|
|
|
Vapor-liquid Equilibrium
for p-Xylene/carbon tetrachloride[5]
P = 760 mm Hg
|
BP
Temp.
°C
| % by mole carbon tetrachloride
|
| liquid | vapor
|
| 136.4 | 1.7 | 5.9
|
| 131.1 | 6.3 | 21.6
|
| 126.2 | 11.1 | 34.9
|
| 121.8 | 15.7 | 45.3
|
| 117.6 | 20.3 | 53.9
|
| 113.5 | 25.2 | 61.6
|
| 109.8 | 30.1 | 67.9
|
| 106.2 | 35.1 | 73.1
|
| 102.7 | 40.5 | 77.9
|
| 102.2 | 41.3 | 78.7
|
| 98.1 | 48.5 | 83.6
|
| 94.4 | 55.8 | 87.6
|
| 91.1 | 62.9 | 90.8
|
| 88.0 | 70.1 | 93.4
|
| 85.2 | 77.2 | 95.4
|
| 82.6 | 84.0 | 96.9
|
| 80.0 | 91.1 | 98.4
|
| 77.6 | 97.7 | 99.7
|
|
|
Vapor-liquid Equilibrium
for p-Xylene/Butanone[5]
P = 760 mm Hg
|
BP
Temp.
°C
| % by mole butanone
|
| liquid | vapor
|
| 129.45 | 4.8 | 20.8
|
| 125.42 | 7.9 | 31.7
|
| 123.25 | 10.2 | 38.1
|
| 116.80 | 16.1 | 51.1
|
| 112.44 | 21.0 | 59.4
|
| 105.55 | 30.5 | 71.0
|
| 101.15 | 38.7 | 75.5
|
| 95.30 | 50.6 | 85.2
|
| 93.90 | 54.6 | 87.2
|
| 89.45 | 67.0 | 91.7
|
| 86.55 | 77.0 | 94.7
|
| 85.02 | 81.5 | 95.9
|
| 84.58 | 83.1 | 96.2
|
| 80.65 | 97.0 | 994
|
|
|
|
Vapor-liquid Equilibrium
for p-Xylene/Aniline[5]
P = 745 mm Hg
|
BP
Temp.
°C
| % by mole p-xylene
|
| liquid | vapor
|
| 171 | 7.5 | 37.0
|
| 165 | 14.0 | 50.0
|
| 156 | 26.5 | 67.5
|
| 148 | 48.5 | 80.0
|
| 142 | 72.5 | 89.0
|
| 140 | 83.0 | 92.0
|
|
|
Spectral data
| UV-Vis
|
| Spectrum
|
|
| λmax
| ? nm
|
| Extinction coefficient, ε
| ?
|
| IR
|
| Spectrum
| NIST
|
| Major absorption bands
| 793.94 cm−1
|
| NMR
|
| Spectrum
| AIST
|
| Proton NMR
| 2.296, 7.046
|
| Carbon-13 NMR
| 134.66, 128.97, 20.90
|
| MS
|
| Spectrum
| NIST
|
Masses of
main fragments
| 106, 91, 77
|
References
- ^ Lange's Handbook of Chemistry, 10th ed, pp 1661-1663
- ^ Lange's Handbook of Chemistry, 10th ed, pp 1669-1674
- ^ a b Pure Component Properies (Queriable database). Chemical Engineering Research Information Center.
- ^ Lange's Handbook of Chemistry 10th ed, pp 1522-1524
- ^ a b c d e Binary Vapor-Liquid Equilibrium Data (Queriable database). Chemical Engineering Research Information Center. Retrieved on 26 May 2007.
- NIST Standard Reference Database
- University of Akron, Chemistry Department, Chemical Database
- National Institute of Advanced Industrial Science and Technology
Except where noted otherwise, data relate to standard ambient temperature and pressure.
Disclaimer applies.
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