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
Index of refraction, nD 1.4958 (20 C)
Dielectric constant, εr 2.2 ε0 at 20 °C

[edit] Thermodynamic properties

Phase behavior
Triple point  ? K (? °C), ? Pa
Critical point 616 K (343 °C), 34.64 Pa
Std enthalpy change
of fusion, ΔfusHo		 16.8 kJ/mol
Std entropy change
of fusion, ΔfusSo		  ? J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo		 35.7 kJ/mol
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		  ? kJ/mol
Standard molar entropy,
Soliquid		  ? J/(mol K)
Heat capacity, cp  ? J/(mol K)
Gas properties
Std enthalpy change
of formation, ΔfHogas		  ? kJ/mol
Standard molar entropy,
Sogas		  ? J/(mol K)
Heat capacity, cp  ? J/(mol K)

[edit] 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

[edit] References


Except where noted otherwise, data relate to standard ambient temperature and pressure.

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