ABSTRACT
Common Name: Chloromethane Synonym: methyl chloride, monochloromethane Chemical Name: chloromethane CAS Registry No: 74-87-3 Molecular Formula: CH3Cl Molecular Weight: 50.488 Melting Point (°C):
–97.7 (Lide 2003) Boiling Point (°C):
–24.09 (Lide 2003) Density (g/cm3 at 20°C):
0.9159 (Dreisbach 1961; Horvath 1982; Weast 1982-83) 0.9214, 0.9111 (20°C, 25°C, Riddick et al. 1986)
Molar Volume (cm3/mol): 55.0 (calculated-density, Wang et al. 1992) 50.6, 48.8, 54.3, 50.4 (exptl., Tyn and Calus method, Schroeder method, Le Bas method, Reid et al. 1987) 50.5 (calculated-Le Bas method at normal boiling point)
Enthalpy of Vaporization, ∆HV (kJ/mol): 19.06, 21.45 (at 25°C, at normal boiling point, Dreisbach 1961) 18.92, 21.40 (25°C, bp, Riddick et al. 1986)
Enthalpy of Fusion, ∆Hfus (kJ/mol): 6.43 (Riddick et al. 1986)
Entropy of Fusion, ∆Sfus (J/mol K): Fugacity Ratio at 25°C, F: 1.0
Water Solubility (g/m3 or mg/L at 25°C or as indicated. Additional data at other temperatures designated * are compiled at the end of this section): 7400 (30°C at 1 atm, McGovern 1943) 5346 (gravitational method, Glew & Moelwyn-Hughes 1953) 6450 (20°C, Dean 1973) 7250 (20°C under 101.3 kPa pressure of CH3Cl, McConnell et al. 1975; Pearson & McConnell 1975) 6270, 5380 (20, 25°C literature average at 760 mmHg, Dilling 1977) 5325* (summary of literature data, temp range 5-80°C, Horvath 1982) 4800 (Dean 1985) 6480 (30°C, quoted, Riddick et al. 1986)
Vapor Pressure (Pa at 25°C or as indicated and reported temperature dependence equations. Additional data at other temperatures designated * are compiled at the end of this section): 98048* (248.9 K, static-manometer, measured range 191.4-248.9 K, Messerly & Aston 1940) 101325* (–24.0°C, summary of literature data, temp range –99.58 to 24.0°C, Stull 1947) 559860 (interpolated from graph, temp range –50 to 60°C, McGovern 1943) 100800 (Glew & Moelwyn-Hughes 1953) 574500 (calculated-Antoine eq., Dreisbach 1959; 1961) log (P/mmHg) = 6.99445 – 902.451/(243.63 + t/°C); temp range –80 to 3°C (Antoine eq. for liquid state,
Dreisbach 1959; 1961)
H H Cl
H
correlation of selected lit. data, Li & Rossini 1961)
1081* (29.43°C, concentration ratio, measured range 29.43-40.59°C, Swain & Thornton 1962) 539300 (20-25°C, calculated-Antoine eq., Weast 1972-73) log (P/mmHg) = [–0.2185 × 5375.3/(T/K)] + 7.546207; temp range –99 to 137.5°C (Antoine eq., Weast 1972-73) 567900, 576300 (calculated-Antoine eq., Boublik et al. 1973) log (P/mmHg) = 6.98762 – 899.739/(242.921 + t/°C); temp range –69.2 to –23°C (Antoine eq. from reported
exptl. data, Boublik et al. 1973) log (P/mmHg) = 6.09349 – 948.582/(249.336 + t/°C); temp range –75.2 to 5°C (Antoine eq. from reported exptl.
