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Dimethyl sulfide

Dimethyl sulfide
Skeletal formula of dimethyl sulfide with all implicit hydrogens shown
Spacefill model of dimethyl sulfide
Names
Preferred IUPAC name
(Methylsulfanyl)methane
Other names
(Methylthio)methane
Dimethyl sulfide
Identifiers
75-18-3 YesY
3D model (Jmol) Interactive image
3DMet B00138
1696847
ChEBI CHEBI:17437 YesY
ChEMBL ChEMBL15580 YesY
ChemSpider 1039 YesY
ECHA InfoCard 100.000.770
EC Number 200-846-2
KEGG C00580 YesY
MeSH dimethyl+sulfide
PubChem 1068
RTECS number PV5075000
UNII QS3J7O7L3U YesY
UN number 1164
Properties
C2H6S
Molar mass 62.13 g·mol−1
Appearance Colourless liquid
Odor Cabbage, sulfurous
Density 0.846 g cm−3
Melting point −98 °C; −145 °F; 175 K
Boiling point 35 to 41 °C; 95 to 106 °F; 308 to 314 K
log P 0.977
Vapor pressure 53.7 kPa (at 20 °C)
-44.9·10−6 cm3/mol
1.435
Thermochemistry
-66.9--63.9 kJ mol−1
-2.1818--2.1812 MJ mol−1
Hazards
Safety data sheet osha.gov
GHS pictograms The flame pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The corrosion pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word DANGER
H225, H315, H318, H335
P210, P261, P280, P305+351+338
Highly Flammable F Harmful Xn
R-phrases R11, R22, R37/38, R41
S-phrases S7, S9, S16, S26, S29, S33, S36/39
Flash point −36 °C (−33 °F; 237 K)
206 °C (403 °F; 479 K)
Explosive limits 19.7%
Related compounds
Related chalcogenides
Dimethyl ether (dimethyl oxide)

Dimethyl selenide
Dimethyl telluride

Related compounds
Dimethyl sulfoxide

Dimethyl sulfone

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY  (what is YesYN ?)
Infobox references

Dimethyl selenide
Dimethyl telluride

Dimethyl sulfone

Dimethyl sulfide (DMS) or methylthiomethane is an organosulfur compound with the formula (CH3)2S. Dimethyl sulfide is a water-insoluble flammable liquid that boils at 37 °C (99 °F) and has a characteristic disagreeable odor. It is a component of the smell produced from cooking of certain vegetables, notably maize, cabbage, beetroot and seafoods. It is also an indication of bacterial contamination in malt production and brewing. It is a breakdown product of dimethylsulfoniopropionate (DMSP), and is also produced by the bacterial metabolism of methanethiol.

DMS originates primarily from DMSP, a major secondary metabolite in some marine algae. DMS is the most abundant biological sulfur compound emitted to the atmosphere. Emission occurs over the oceans by phytoplankton. DMS is also produced naturally by bacterial transformation of dimethyl sulfoxide (DMSO) waste that is disposed of into sewers, where it can cause environmental odor problems.

DMS is oxidized in the marine atmosphere to various sulfur-containing compounds, such as sulfur dioxide, dimethyl sulfoxide (DMSO), dimethyl sulfone, methanesulfonic acid and sulfuric acid. Among these compounds, sulfuric acid has the potential to create new aerosols which act as cloud condensation nuclei. Through this interaction with cloud formation, the massive production of atmospheric DMS over the oceans may have a significant impact on the Earth's climate. The CLAW hypothesis suggests that in this manner DMS may play a role in planetary homeostasis.



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