Chloromethane (data page)

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 Supelco Inc

Structure and properties

Structure and properties
Index of refraction,[1] nD	1.3389
Abbe number	?
Dielectric constant,[2] 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 [3]	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 tension[4]	19.5 dyn/cm at 0 °C 17.8 dyn/cm at 10 °C 16.2 dyn/cm at 20 °C
Viscosity[5]	0.2280 mPa·s at 0 °C 0.1784 mPa·s at 20 °C 0.1440 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 change of fusion, ΔfusHo	6.43 kJ/mol
Std entropy change of fusion, ΔfusSo	36.66 J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	21.535 kJ/mol at –24.21 °C 20.09 kJ/mol at 20 °C
Std entropy change of vaporization, ΔvapSo	86.51 J/(mol·K) at –24.21 °C
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	–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 change of 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' constants[6]	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.

log₁₀ of Methyl Chloride vapor pressure. Uses formula: ${\displaystyle \scriptstyle \log _{e}P_{mmHg}=}$${\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-7.072977\log _{e}(T+273.15)-{\frac {4094.935}{T+273.15}}+59.41150+1.092121\times 10^{-5}(T+273.15)^{2}}$ obtained from CHERIC^[5]

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