P-Xylene (data page)
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This page provides supplementary chemical data on p-xylene.
Contents |
[edit] Material Safety Data Sheet
[edit] Structure and properties
Structure and properties | |
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Index of refraction, nD | 1.4958 (20 C) |
Dielectric constant, εr | 2.2 ε0 at 20 °C |
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 |
[edit] Thermodynamic properties
Phase behavior | |
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Triple point | 286.3 K (13.15 °C), ? Pa |
Critical point | 617 K (344 °C), 3500 kPa |
Std enthalpy change of fusion, ΔfusH |
17.1 kJ/mol |
Std entropy change of fusion, ΔfusS |
59.8 J/(mol·K) |
Std enthalpy change of vaporization, ΔvapH |
35.7 kJ/mol at 138°C |
Std entropy change of vaporization, ΔvapS |
? J/(mol·K) |
Solid properties | |
Std enthalpy change of formation, ΔfH |
? kJ/mol |
Standard molar entropy, S |
? J/(mol K) |
Heat capacity, cp | ? J/(mol K) |
Liquid properties | |
Std enthalpy change of formation, ΔfH |
–24.4 kJ/mol |
Standard molar entropy, S |
247 J/(mol K) |
Enthalpy of combustion, ΔcH |
–4552 kJ/mol |
Heat capacity, cp | 181.7 J/(mol K) |
Gas properties | |
Std enthalpy change of formation, ΔfH |
179.6 kJ/mol[3] at 25°C |
Standard molar entropy, S |
? 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 |
[edit] 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.
[edit] Distillation data
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[edit] Spectral data
UV-Vis | |
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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 |
[edit] 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.
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