528021

Dimethylsulfid

• Synonym(e): DMS, Methylsulfid
• Lineare Formel: (CH₃)₂S
• CAS-Nummer: 75-18-3
• Molekulargewicht: 62.13
• Beilstein: 1696847
• EG-Nummer: 200-846-2
• MDL-Nummer: MFCD00008562
• UNSPSC-Code: 12352200
• PubChem Substanz-ID: 329757889

Eigenschaften

• Dampfdichte: 2.1 (vs air)
• Dampfdruck: 26.24 psi ( 55 °C); 7.79 psi ( 20 °C)
• Assay: ≥99%
• Selbstzündungstemp.: 402 °F
• Expl.-Gr.: 19.7 %
• Verfügbarkeit: available only in EU
• Brechungsindex: n20/D 1.435 (lit.)
• bp: 38 °C (lit.)
• mp (Schmelzpunkt): −98 °C (lit.)
• Löslichkeit: water: soluble 7.28 g/L at 20 °C
• Dichte: 0.846 g/mL at 25 °C (lit.)
• Lagertemp.: 2-8°C
• SMILES String: CSC
• InChI: 1S/C2H6S/c1-3-2/h1-2H3
• InChIKey: QMMFVYPAHWMCMS-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Dimethyl sulfide (DMS) is a biogenic sulfur compound[1] that is released from the ocean to the atmosphere.[2] It forms the main component of the global sulfur cycle.[1][2] The thermal decomposition behavior of dimethyl sulfide in gas phase has been investigated in a static system at 681-723K.[3] The mechanism of its photochemical oxidation in atmosphere has been described.[2] The rate constants of the gas phase reaction between OH radicals and DMS have been determined by relative rate method and flash photolysis.[4] The differential Raman cross section, σ_DMS at different excitation wavelengths has been measured.[1] The adsorption of DMS on activated carbons (ACs) has been reported to take place by hydrogen bonding.[5]

Anwendung

Dimethyl sulfide may be used to prepare methanethiol by thiolation reaction with hydrogen sulfide (H₂S) in the presence of tungsten-zirconia (WO₃/ZrO₂) catalyst.[6]

Rechtliche Hinweise

hergestellt von Arkema

Sicherheitshinweise

• Piktogramme: GHS02
• Signalwort: Danger
• H-Sätze: H225
• P-Sätze: P210 - P233 - P240 - P241 - P242 - P243
• Gefahreneinstufungen: Flam. Liq. 2
• Lagerklassenschlüssel: 3 - Flammable liquids
• WGK: WGK 1
• Flammpunkt (°F): -32.8 °F - closed cup
• Flammpunkt (°C): -36 °C - closed cup
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves