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
Structure and properties Index of refraction,Merck Index of Chemicals and Drugs, 9th ed. monograph 9743 nD 1.5058 at 20°C Abbe number? Dielectric constant,CRC Handbook of Chemistry and Physics, 44th ed. pp 2611–2620 εr 2.568 ε0 at 20 °C Bond strength ? Bond length ? Bond angle ? Magnetic susceptibility ? Surface tensionCRC Handbook of Chemistry and Physics, 44th ed. pp 2244–2248 30.10 dyn/cm at 20°C ViscosityLange's Handbook of Chemistry, 10th ed. pp 1669–1674 1.1049 mPa·s at 0°C0.8102 mPa·s at 20°C0.6270 mPa·s at 40°C0.4168 mPa·s at 80°C0.2626 mPa·s at 140°C SolubilityCRC Handbook of Chemistry and Physics, 85th ed. p8-111 0.171 g/L at 25°C 0.21 g/L at 45°C
Thermodynamic properties
Phase behavior Triple point 247.8 K (−25.3 °C), ? Pa Critical point 631 K (358 °C), 3700 kPa Std enthalpy changeof fusion, ΔfusHo 13.6 kJ/mol Std entropy changeof fusion, ΔfusSo 54.87 J/(mol·K) at −25.3 Std enthalpy changeof vaporization, ΔvapHo 36.24 kJ/mol at 144.5°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 −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 changeof 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' constantsLange's Handbook of Chemistry, 10th ed, pp 1522–1524 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: m-xylene (data page) p-xylene (data page)
Vapor-liquid Equilibriumfor o-Xylene/m-XyleneP = 26.66 kPa BPTemp.°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 Equilibriumfor o-Xylene/Carbon tetrachlorideP = 760 mm Hg BPTemp.°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 Equilibriumfor o-Xylene/EthanolP = 101.3 kPa BPTemp.°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 Equilibriumfor o-Xylene/MethanolP = 101.3 kPa BPTemp.°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