471577

Dimethyl sulfide

≥99%

• Synonym(s): DMS, Methyl sulfide
• Linear Formula: (CH₃)₂S
• CAS Number: 75-18-3
• Molecular Weight: 62.13
• Beilstein/REAXYS Number: 1696847
• EC Number: 200-846-2
• MDL number: MFCD00008562
• UNSPSC Code: 12352100
• PubChem Substance ID: 57650900
• NACRES: NA.21

Properties

• vapor density: 2.1 (vs air)
• Quality Level: 200
• vapor pressure: 26.24 psi ( 55 °C); 7.79 psi ( 20 °C)
• assay: ≥99%
• autoignition temp.: 402 °F
• expl. lim.: 19.7 %
• refractive index: n20/D 1.435 (lit.)
• 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.)
• functional group: thioether
• SMILES string: CSC
• InChI: 1S/C2H6S/c1-3-2/h1-2H3
• InChI key: QMMFVYPAHWMCMS-UHFFFAOYSA-N
• Gene Information: rat ... Maoa(29253) , Maob(25750)

Description

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 constant of the gas phase reaction between OH radicals and DMS have been determined by relative rate methods and flash photolysis technique. The differential Raman cross section, σ_DMS 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

• Characterization of the aroma-active compounds in Xiaokeng green tea by three pretreatment methods combined with gas chromatography-olfactometry (GC-O).: This study identified and characterized the aroma-active compounds in Xiaokeng green tea, highlighting the significant role of dimethyl sulfide as a contributor to its unique aroma profile (Gan et al., 2024).
• Novel insights into dimethylsulfoniopropionate cleavage by deep subseafloor fungi.: This article provides new insights into the metabolic pathways of deep-sea fungi, focusing on the cleavage of dimethylsulfoniopropionate (DMSP) and subsequent production of dimethyl sulfide, impacting sulfur cycling in marine ecosystems (Liu et al., 2024).
• Adsorption Mechanism and Regeneration Performance of Calcined Zeolites for Hydrogen Sulfide and Its Application.: The study explores the use of calcined zeolites for the adsorption of hydrogen sulfide, a precursor to dimethyl sulfide, and discusses the material′s regeneration performance for industrial applications (Zha et al., 2024).

Safety Information

• pictograms: GHS02
• signalword: Danger
• hcodes: H225
• pcodes: P210 - P233 - P240 - P241 - P242 - P243
• Hazard Classifications: Flam. Liq. 2
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 1
• flash_point_f: -32.8 °F - closed cup
• flash_point_c: -36 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves