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.

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: ${\displaystyle \scriptstyle \log _{e}P_{mmHg}=}$${\displaystyle \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:

• p-xylene (data page)
• o-xylene (data page)

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

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• Except where noted otherwise, data relate to Standard temperature and pressure.
• Reliability of data general note.