P-Xylene (data page) explained
This page provides supplementary chemical data on p-xylene.
Material Safety Data Sheet
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source and follow its directions.
Structure and properties
| Structure and properties |
|---|
| Index of refraction, nD | 1.4958 at 20 °C |
| Abbe number | ? Please omit if not applicable --> |
| Dielectric constant, εr | 2.2 ε0 at 20 °C |
| Bond strength | ? Specify which bond. |
| Bond length | ? Specify which bond. |
| Bond angle | ? Specify which angle, e.g. Cl-P-O. |
| Magnetic susceptibility | ? --> |
| Surface tension[1] | 29.92 dyn/cm at 5 °C
28.27 dyn/cm at 20 °C
24.2 dyn/cm at 60 °C |
| Viscosity[2] | 0.7385 mPa·s at 10 °C
0.6475 mPa·s at 20 °C
0.5134 mPa·s at 40 °C
0.3519 mPa·s at 80 °C
0.2424 mPa·s at 130 °C |
| Solubility[3] | 0.160 g/L at 0 °C
0.181 g/L at 25 °C
0.22 g/L at 40 °C
|
|
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 | 1.796000E+04 kJ/kg-mol[4] 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[5] | 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[6]
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
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
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
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
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 |
| 2.296, 7.046 |
| 134.66, 128.97, 20.90 |
| Other NMR data Insert special data e.g. 19F chem. shifts, omit if not used | --> |
| MS |
|---|
| Spectrum | NIST |
Masses of
main fragments | 106, 91, 77 |
|
References
- Notes
Bibliography
Notes and References
- Lange's Handbook of Chemistry, 10th ed, pp 1661–1663
- Lange's Handbook of Chemistry, 10th ed, pp 1669–1674
- CRC Handbook of Chemistry and Physics, 85th ed. p8-111
- Web site: Pure Component Properties. Queriable database . 26 May 2007 . Chemical Engineering Research Information Center.
- Lange's Handbook of Chemistry 10th ed, pp 1522–1524
- Web site: Binary Vapor-Liquid Equilibrium Data. Chemical Engineering Research Information Center. Queriable database. 26 May 2007.
