M-Xylene (data page)

This page provides supplementary chemical data on m-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 at Fisher Scientific.

Structure and properties

Structure and properties
Index of refraction, nD 1.49722 at 20°C
Abbe number ?
Dielectric constant,[1] εr 2.374 ε0 at 20°C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility ?
Surface tension[2] 31.15 dyn/cm at 0°C
28.90 dyn/cm at 20°C
20.46 dyn/cm at 100°C
Viscosity[3] 0.8059 mPa·s at 0°C
0.6200 mPa·s at 20°C
0.4970 mPa·s at 40°C
0.3455 mPa·s at 80°C
0.2418 mPa·s at 130°C
Solubility[4] 0.203 g/L at 0°C
0.161 g/L at 25°C
0.22 g/L at 40°C

Thermodynamic properties

Phase behavior
Triple point 219.6 K (–53.5 °C), ? Pa
Critical point 618 K (345 °C), ? Pa
Std enthalpy change
of fusion, ΔfusHo		 11.57 kJ/mol
Std entropy change
of fusion, ΔfusSo		 51.36 J/(mol·K) at –47.88°C
Std enthalpy change
of vaporization, ΔvapHo		 35.66 kJ/mol at 139.2°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		 –25.4 kJ/mol
Standard molar entropy,
Soliquid		 253.80 J/(mol K)
Enthalpy of combustion, ΔcHo –4549 kJ/mol
Heat capacity, cp 184.5 J/(mol K) at 25°C
Gas properties
Std enthalpy change
of formation, ΔfHogas		 17.2 kJ/mol
Standard molar entropy,
Sogas		 358.2 J/(mol K)
Heat capacity, cp 125.8 J/(mol K)
van der Waals' constants[5] a = 3076 L2 kPa/mol2
b = 0.1772 liter per mole

Vapor pressure of liquid

P in mm Hg 1 10 40 100 400 760
T in °C –6.9 28.3 55.3 76.8 116.7 139.1

Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.

log10 of m-Xylene vapor pressure. Uses formula: \scriptstyle \log_e P_{mmHg} =\scriptstyle \log_e (\frac {760} {101.325}) - 9.106679\log_e(T+273.15) - \frac {7556.611} {T+273.15} + 76.86698 + 5.403634 \times 10^{-6} (T+273.15)^2 obtained from CHERIC[6]

Distillation data

See also:

Vapor-liquid Equilibrium
for m-Xylene/Carbon tetrachloride[7]
P = 760 mm Hg
BP
Temp.
°C		 % by mole carbon tetrachloride
liquid vapor
137.0 1.8 5.8
131.9 6.5 21.9
126.8 11.4 35.6
122.0 16.4 46.5
118.1 20.8 55.2
113.9 25.8 62.6
110.2 30.6 68.7
106.4 35.7 73.9
102.8 41.2 78.8
102.3 41.9 79.6
98.1 48.8 84.3
94.1 56.2 88.0
90.6 63.5 91.1
87.5 70.4 93.5
84.6 77.5 95.5
82.1 84.3 97.1
79.7 91.1 98.4
77.5 97.7 99.6
    
Vapor-liquid Equilibrium
for m-Xylene/Toluene[7]
P = 760 mm Hg
BP
Temp.
°C		 % by mole toluene
liquid vapor
133.20 11.1 35.8
129.87 18.6 46.2
119.68 52.3 71.8
118.56 56.1 74.1
117.91 59.3 76.0
117.37 62.5 77.9
116.32 67.7 80.2
116.36 68.8 81.6
115.97 69.8 82.2
115.30 73.6 84.4
    
Vapor-liquid Equilibrium
for m-Xylene/Benzene[7]
P = 760 mm Hg
BP
Temp.
°C		 % by mole benzene
liquid vapor
124.80 10.2 44.7
118.94 17.5 59.8
115.40 21.4 65.5
112.30 28.4 73.2
106.35 34.0 78.0
102.08 42.7 83.3
99.15 49.4 86.5
96.70 59.5 90.3
90.89 68.1 93.0
 
Vapor-liquid Equilibrium
for m-Xylene/Aniline[7]
P = 745 mm Hg
BP
Temp.
°C		 % by mole m-xylene
liquid vapor
167 10.0 45.5
160 19.5 58.0
153 34.0 71.5
146 53.0 83.0
143 71.5 89.0
141 82.0 93.0

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

  1. ↑ CRC Handbook of Chemistry and Physics, 44th ed. pp 2611-2620
  2. ↑ Lange's Handbook of Chemistry, 10th ed. pp 1661-1663
  3. ↑ Lange's Handbook of Chemistry, 10th ed. pp 1669-1674
  4. ↑ CRC Handbook of Chemistry and Physics, 85th ed. p 8-111
  5. ↑ Lange's Handbook of Chemistry, 10th ed, pp 1522-1524
  6. ↑ "Pure Component Properties" (Queriable Database). Chemical Engineering Research Information Center. Retrieved 28 May 2007.
  7. 1 2 3 4 "Binary Vapor-Liquid Equilibrium Data" (Queriable database). Chemical Engineering Research Information Center. Retrieved 28 May 2007.

"NIST Standard Reference Database". 

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

Disclaimer applies.

This article is issued from Wikipedia - version of the Sunday, February 17, 2013. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.