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 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, 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.

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.

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