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dielectric&o=10616
dielectric&o=10616

O-Xylene (data page)
This page provides supplementary chemical data on o-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 such as SIRI, and follow its directions. MSDS is available from Safety Information Resources, inc

Structure and properties

Structure and properties
Index of refraction, nD 1.5058 at 20°C
Abbe number ?
Dielectric constant, εr 2.568 ε0 at 20 °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility ?
Surface tension 30.10 dyn/cm at 20°C
Viscosity 1.1049 mPa·s at 0°C
0.8102 mPa·s at 20°C
0.6270 mPa·s at 40°C
0.4168 mPa·s at 80°C
0.2626 mPa·s at 140°C

Thermodynamic properties

Phase behavior
Triple point 247.8 K (–25.3 °C), ? Pa
Critical point 631 K (358 °C), 3700 Pa
Std enthalpy change
of fusion, ΔfusHo 		13.6 kJ/mol
Std entropy change
of fusion, ΔfusSo 		54.87 J/(mol·K) at –25.3
Std enthalpy change
of vaporization, ΔvapHo 		36.24 kJ/mol at 144.5°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 187.0 J/(mol K) at 25°C
Gas properties
Std enthalpy change
of formation, ΔfHogas 		19.0 kJ/mol
Standard molar entropy,
Sogas 		353.6 J/(mol K)
Heat capacity, cp 132.5 J/(mol K) at 25°C
van der Waals' constants a = 3038 L2 kPa/mol2
b = 0.1755 liter per mole

Vapor pressure of liquid

P in mm Hg 1 10 40 100 400 760
T in °C –3.8 32.1 59.5 81.3 121.7 144.4
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.


Distillation data

See also:

Vapor-liquid Equilibrium
for o-Xylene/m-Xylene
P = 26.66 kPa
BP
Temp.
°C 		% by mole m-xylene
liquid vapor
100.1 0.0 0.0
99.8 4.7 5.6
99.6 9.7 11.4
99.2 17.8 20.6
98.8 25.9 29.3
98.4 34.1 38.1
97.9 42.5 46.8
97.6 49.6 53.9
97.2 57.4 61.5
96.8 65.5 69.2
96.5 73.5 76.5
96.1 80.8 83.2
95.8 88.6 90.2
95.6 93.7 94.6
95.3 100.0 100.0
   
Vapor-liquid Equilibrium
for o-Xylene/Carbon tetrachloride
P = 760 mm Hg
BP
Temp.
°C 		% by mole carbon tetrachloride
liquid vapor
142.0 1.8 6.5
136.0 6.4 22.9
130.4 11.2 36.9
125.0 16.1 49.4
120.7 20.4 57.3
116.1 25.3 64.6
111.8 30.2 70.9
107.9 35.2 75.9
104.2 40.4 80.3
104.1 40.5 80.5
99.4 47.8 85.2
95.1 55.4 88.9
91.6 62.4 91.6
88.2 70.0 94.0
85.3 77.1 95.8
82.6 84.1 97.2
80.0 91.0 98.5
77.7 97.6 99.6
   
Vapor-liquid Equilibrium
for o-Xylene/Ethanol
P = 101.3 kPa
BP
Temp.
°C 		% by mole ethanol
liquid vapor
78.3 99.52 99.66
78.7 98.59 99.03
78.7 97.73 98.52
79.0 95.78 97.40
79.3 90.59 95.09
79.7 86.79 94.16
80.0 85.01 93.70
80.2 80.91 92.91
80.3 76.77 92.36
82.0 67.69 91.21
83.8 48.66 89.25
88.1 25.11 87.32
97.3 10.94 81.49
112.8 5.22 65.91
137.3 0.65 22.90
   
Vapor-liquid Equilibrium
for o-Xylene/Methanol
P = 101.3 kPa
BP
Temp.
°C 		% by mole Methanol
liquid vapor
64.7 98.78 99.10
64.8 98.33 98.81
64.8 97.67 98.45
64.9 96.70 97.96
65.3 93.34 96.82
65.7 86.84 95.68
66.3 84.24 95.31
66.7 83.30 95.65
67.3 76.74 94.97
68.4 49.33 94.52
71.5 21.76 93.84
102.1 2.49 80.00

Spectral data

UV-Vis
λmax ? nm
Extinction coefficient, ε ?
IR
Major absorption bands ? cm−1
NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
MS
Masses of
main fragments 		 

References

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

Chemical infobox applies.

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Last updated on Monday August 04, 2008 at 16:43:13 PDT (GMT -0700)
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