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,CRC Handbook of Chemistry and Physics, 44th ed. pp 2611–2620 εr 2.374 ε0 at 20 °C Bond strength ? Bond length ? Bond angle ? Magnetic susceptibility ? Surface tensionLange's Handbook of Chemistry, 10th ed. pp 1661–1663 31.15 dyn/cm at 0 °C28.90 dyn/cm at 20 °C20.46 dyn/cm at 100 °C ViscosityLange's Handbook of Chemistry, 10th ed. pp 1669–1674 0.8059 mPa·s at 0 °C0.6200 mPa·s at 20 °C0.4970 mPa·s at 40 °C0.3455 mPa·s at 80 °C0.2418 mPa·s at 130 °C SolubilityCRC Handbook of Chemistry and Physics, 85th ed. p 8-111 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 changeof fusion, ΔfusHo 11.57 kJ/mol Std entropy changeof fusion, ΔfusSo 51.36 J/(mol·K) at –47.88 °C Std enthalpy changeof vaporization, ΔvapHo 35.66 kJ/mol at 139.2 °C Std entropy changeof vaporization, ΔvapSo ? J/(mol·K) Solid properties Std enthalpy changeof formation, ΔfHosolid ? kJ/mol Standard molar entropy,Sosolid ? J/(mol K) Heat capacity, cp ? J/(mol K) Liquid properties Std enthalpy changeof 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 changeof 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' constantsLange's Handbook of Chemistry, 10th ed, pp 1522–1524 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.
Distillation data See also: p-xylene (data page) o-xylene (data page)
Vapor-liquid Equilibriumfor m-Xylene/Carbon tetrachlorideP = 760 mm Hg BPTemp.°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 Equilibriumfor m-Xylene/TolueneP = 760 mm Hg BPTemp.°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 Equilibriumfor m-Xylene/BenzeneP = 760 mm Hg BPTemp.°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 Equilibriumfor m-Xylene/AnilineP = 745 mm Hg BPTemp.°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