528021
Dimethyl sulfide
Synonym(s):
DMS, Methyl sulfide
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About This Item
Linear Formula:
(CH3)2S
CAS Number:
Molecular Weight:
62.13
EC Number:
200-846-2
UNSPSC Code:
12352200
PubChem Substance ID:
Beilstein/REAXYS Number:
1696847
MDL number:
InChI key
QMMFVYPAHWMCMS-UHFFFAOYSA-N
InChI
1S/C2H6S/c1-3-2/h1-2H3
SMILES string
CSC
vapor density
2.1 (vs air)
vapor pressure
26.24 psi ( 55 °C), 7.79 psi ( 20 °C)
assay
≥99%
autoignition temp.
402 °F
expl. lim.
19.7 %
availability
available only in EU
bp
38 °C (lit.)
mp
−98 °C (lit.)
solubility
water: soluble 7.28 g/L at 20 °C
density
0.846 g/mL at 25 °C (lit.)
storage temp.
2-8°C
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General description
Dimethyl sulfide (DMS) is a biogenic sulfur compound that is released from the ocean to the atmosphere. It forms the main component of the global sulfur cycle. The thermal decomposition behavior of dimethyl sulfide in gas phase has been investigated in a static system at 681-723K. The mechanism of its photochemical oxidation in atmosphere has been described. The rate constants of the gas phase reaction between OH radicals and DMS have been determined by relative rate method and flash photolysis. The differential Raman cross section, σDMS at different excitation wavelengths has been measured. The adsorption of DMS on activated carbons (ACs) has been reported to take place by hydrogen bonding.
Application
Dimethyl sulfide may be used to prepare methanethiol by thiolation reaction with hydrogen sulfide (H2S) in the presence of tungsten-zirconia (WO3/ZrO2) catalyst.
Legal Information
Product of Arkema
signalword
Danger
hcodes
Hazard Classifications
Flam. Liq. 2
Storage Class
3 - Flammable liquids
wgk
WGK 1
flash_point_f
-32.8 °F - closed cup
flash_point_c
-36 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves
Regulatory Information
危险化学品
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The pyrolysis of dimethyl sulfide, kinetics and mechanism.
Shum LGS and Benson SW.
International Journal of Chemical Kinetics, 17(7), 749-761 (1985)
Adsorption of dimethyl sulfide vapors by activated carbons.
Goyal M, et al.
Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 322(1), 164-169 (2008)
The reaction of OH radicals with dimethyl sulfide.
Wallington TJ, et al.
International Journal of Chemical Kinetics, 18(8), 837-846 (1986)
Thiolation of dimethyl sulfide to methanethiol over WO3/ZrO2 catalysts.
Chen S, et al.
J. Mol. Catal. A: Chem., 365, 60-65 (2012)
Differential Raman cross section of dimethyl sulfide.
Barletta RE and Roe CH.
Journal of Raman Spectroscopy, 42(1), 117-121 (2011)
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