320293

Dimethyl-sulfat

≥99%

• Synonym(e): Schwefelsäure-dimethylester
• Lineare Formel: (CH₃O)₂SO₂
• CAS-Nummer: 77-78-1
• Molekulargewicht: 126.13
• Beilstein: 635994
• EG-Nummer: 201-058-1
• MDL-Nummer: MFCD00008416
• UNSPSC-Code: 12352108
• PubChem Substanz-ID: 24859257
• NACRES: NA.22

Eigenschaften

• Dampfdichte: 4.3 (vs air)
• Qualitätsniveau: 200
• Dampfdruck: 0.7 mmHg ( 25 °C)
• Assay: ≥99%
• Form: liquid
• Selbstzündungstemp.: 923 °F
• Brechungsindex: n20/D 1.386 (lit.)
• bp: 188 °C (lit.)
• mp (Schmelzpunkt): −32 °C (lit.)
• Dichte: 1.333 g/mL at 25 °C (lit.)
• SMILES String: COS(=O)(=O)OC
• InChI: 1S/C2H6O4S/c1-5-7(3,4)6-2/h1-2H3
• InChIKey: VAYGXNSJCAHWJZ-UHFFFAOYSA-N

Beschreibung

Anwendung

Dimethyl sulfate is a powerful methylating reagent for the methylation of carboxylic acids, alcohols, phenols, lactams, oximes, hydroxylamines, and hydroperoxides. It can be used as a reagent for the preparation of N-methyl alkyl- and aryl-substituted amines, amides, and quaternary ammonium salts. Dimethyl sulfate is also used in the methylation of sulfur-containing compounds to synthesize sulfides and sulfonium ions.
It can also be used as a reagent:       

• For the preparation of quaternary ammonium acrylic monomer as a potent antibacterial agent by the quaternization of 2-dimethylamino ethyl methacrylate.       
• Along with dimethyl sulfoxide for the synthesis of epoxides from aldehydes and ketones via formation of trimethylsulfonium cation.      
• To prepare an oxygenate additive for diesel by the methylation of glycerol.

Sicherheitshinweise

• Piktogramme: GHS05,GHS06,GHS08
• Signalwort: Danger
• H-Sätze: H301 - H314 - H317 - H330 - H341 - H350
• P-Sätze: P202 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Gefahreneinstufungen: Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Carc. 1B - Eye Dam. 1 - Muta. 2 - Skin Corr. 1B - Skin Sens. 1
• Lagerklassenschlüssel: 6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
• WGK: WGK 3
• Flammpunkt (°F): 181.4 °F - closed cup
• Flammpunkt (°C): 83 °C - closed cup
• Persönliche Schutzausrüstung: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter