This page provides supplementary chemical data on chloromethane.
Safety data sheet
The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the safety data sheet for this chemical from a reliable source such as SIRI, and follow its directions. SDS for chloromethane is available at
Structure and properties
Structure and properties Index of refraction, nD 1.3389 Abbe number ? Dielectric constant, εr 12.9 ε0 at 25 °C Bond strength ? Bond length ? Bond angle ? Dipole moment 1.9 D Magnetic susceptibility ? Acentric factor 0.153 Critical compressibility 0.268247 Compressibility factor 0.985 Density Air Liquide Gas Encyclopedia 1002.9 kg/m3 at -24.2 °C (liquid)2.55 kg/m3 at -24.2 °C (gas)2.22 kg/m3 at 0 °C (gas)2.134 kg/m3 at 15 °C (gas) Surface tensionLange's Handbook of Chemistry, 10th ed. pp. 1661–1663 19.5 dyn/cm at 0 °C17.8 dyn/cm at 10 °C16.2 dyn/cm at 20 °C Viscosity 0.2280 mPa·s at 0 °C0.1784 mPa·s at 20 °C0.1440 mPa·s at 40 °C Thermal conductivity 10.5 mW/(m·K) at 0 °C
Thermodynamic properties
Phase behavior Triple point 175.43 K (–97.72 °C), 870 Pa Critical point 416 K (143 °C), 6714.4 kPa Std enthalpy changeof fusion, ΔfusHo 6.43 kJ/mol Std entropy changeof fusion, ΔfusSo 36.66 J/(mol·K) Std enthalpy changeof vaporization, ΔvapHo 21.535 kJ/mol at –24.21 °C20.09 kJ/mol at 20 °C Std entropy changeof vaporization, ΔvapSo 86.51 J/(mol·K) at –24.21 °C 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 –86.37 kJ/mol at 25 °C Standard molar entropy,Soliquid 140.08 J/(mol K) Heat capacity, cp 81.2 J/(mol K) at 15 °C Gas properties Std enthalpy changeof formation, ΔfHogas –83.68 kJ/mol Standard molar entropy,Sogas 234.36 J/(mol K) at 100 kPa Enthalpy of combustion, ΔcHogas –764.0 kJ/mol Heat capacity, cp 40.70 J/(mol K) at 25 °C van der Waals' constantsLange's Handbook of Chemistry 10th ed, pp. 1522–1524 a = 757.0 L2 kPa/mol2 b = 0.06483 liter per mole
Vapor pressure of liquid P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600 T in °C — –92.4 –76.0 –63.0 –38.0 –24.0 –6.4 22.0 47.3 77.3 113.8 137.5 Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
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