O-Xylene (data page)

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Template:Short description 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 eChemPortal, and follow its directions. MSDS is available from MATHESON TRI-GAS, INC. in the SDSdata.org database.

Structure and properties

Template:Chembox header | Structure and properties
Index of refraction,[1] nD 1.5058 at 20°C
Abbe number ?
Dielectric constant,[2] εr 2.568 ε0 at 20 °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility ?
Surface tension[3] 30.10 dyn/cm at 20°C
Viscosity[4] 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
Solubility[5] 0.171 g/L at 25°C
0.21 g/L at 45°C

Thermodynamic properties

Template:Chembox header | Phase behavior
Triple point 247.8 K (−25.3 °C), ? Pa
Critical point 631 K (358 °C), 3700 kPa
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)
Template:Chembox header | Solid properties
Std enthalpy change
of formation, ΔfHosolid 		? kJ/mol
Standard molar entropy,
Sosolid 		? J/(mol K)
Heat capacity, cp ? J/(mol K)
Template:Chembox header | 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
Template:Chembox header | 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[6] a = 3038 L2 kPa/mol2
b = 0.1755 liter per mole

Vapor pressure of liquid

Template:Chembox header | P in mm Hg 1 10 40 100 400 760
Template:Chembox header | 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.

log10 of o-Xylene vapor pressure. Uses formula: logePmmHg=loge(760101.325)−10.06059loge(T+273.15)−7946.229T+273.15+83.32184+5.939742×10−6(T+273.15)2 obtained from CHERIC[7]

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Distillation data

See also:

Vapor-liquid Equilibrium
for o-Xylene/m-Xylene[8]
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[8]
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[8]
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[8]
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

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Spectral data

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

Template:Chemical data page general note

References

  1. ↑ Merck Index of Chemicals and Drugs, 9th ed. monograph 9743
  2. ↑ CRC Handbook of Chemistry and Physics, 44th ed. pp 2611–2620
  3. ↑ CRC Handbook of Chemistry and Physics, 44th ed. pp 2244–2248
  4. ↑ Lange's Handbook of Chemistry, 10th ed. pp 1669–1674
  5. ↑ CRC Handbook of Chemistry and Physics, 85th ed. p8-111
  6. ↑ Lange's Handbook of Chemistry, 10th ed, pp 1522–1524
  7. ↑ Template:Cite web
  8. ↑ 8.0 8.1 8.2 8.3 Template:Cite web

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