2
Physical
and Chemical Properties
DMS
synonyms: Methane, thiobis-; Methyl sulfide; Dimethyl monosulfide; Dimethyl
thioether; DMS;
Methyl Monosulfide; 2-Thiapropane; Dimethyl sulphide; Thiobismethane; (CH3)2S;
Dimethylsulfide;
Exact-S; Methyl sulphide; Methylthiomethane; Sulfure de methyle; 2-Thiopropane;
UN 1164; Methyl
thioether; Thiopropane; Sulfide, methyl-; (Methylsulfanyl)methane
Autoignition
Temperature (ASTM E 659): 206
°
C (403
°
F)
Boiling
Point: 38
°
C (99
°
F)
Boiling
Range (Anhydrous): 90% @37.1 +0.2° C
CAS
Registry Number: 75-18-3
Coefficient
of Expansion:
0. 0013
ml/ml/°C.
Critical
Pressure: 826 psia= 56.1 atm= 5.69 MN/sq m [U.S. Coast Guard, Department
of
Transportation. CHRIS - Hazardous Chemical Data. Manual Two. Washington, DC:
U.S.
Government Printing Office, Oct., 1978., p. ]
Critical
Temperature: 444 deg F= 229 deg C= 502 deg K
Density/Specific
Gravity: 0.847 (20°C) (water = 1)
Dielectric
Constant: 12
Evaporation
rate (n-butyl acetate = 1): »1.0
Flash
Point (ASTM D-93, closed cup): -48
°
C (-54
°
F)
Flash
Point (calculated): -34° C
Formula:
C
2
H
6
S
Freezing
Point: -98.3
°
C (-145
°
F)
Hansen
Solubility Data:
Dispersion
16.1
Polar 6.4
Hydrogen Bonding 7.4
Heat
of Combustion: 13,200 Btu/lb= 7340 cal/g= 457.3 K cal/mol= 307X10+5 J/kg
[U.S. Coast
Guard, Department of Transportation. CHRIS - Hazardous Chemical Data. Manual
Two.
Washington, DC: U.S. Government Printing Office, Oct., 1978., p. ]
Heat of Fusion: 30.73 cal/g
Heat
of Vaporization: 194 Btu/lb= 108 cal/g= 4.52X10+5 J/kg [U.S. Coast Guard,
Department of
Transportation. CHRIS - Hazardous Chemical Data. Manual Two. Washington, DC:
U.S.
Government Printing Office, Oct., 1978., p. ]
Henry'
Law Constant: 1.61X10-3 atm cu-m\mol @ 25° C [Gaffney JS et al; Environ
Sci Technol
21: 519-23 (1987)]
Hydroxyl
radical rate constant: 4.56X10-12 cu-cm/molc sec @ 25° C [Atkinson R;
Journal of
Physical And Chemical Reference Data. Monograph No 1 (1989)]