320293

Dimethyl sulfate

≥99%

• Sinonimo/i: Sulfuric acid dimethyl ester
• Formula condensata: (CH₃O)₂SO₂
• Numero CAS: 77-78-1
• Peso molecolare: 126.13
• Beilstein: 635994
• Numero CE: 201-058-1
• Numero MDL: MFCD00008416
• Codice UNSPSC: 12352108
• ID PubChem: 24859257
• NACRES: NA.22

Proprietà

• Densità del vapore: 4.3 (vs air)
• Livello qualitativo: 200
• Tensione di vapore: 0.7 mmHg ( 25 °C)
• Saggio: ≥99%
• Forma fisica: liquid
• Temp. autoaccensione: 923 °F
• Indice di rifrazione: n20/D 1.386 (lit.)
• P. eboll.: 188 °C (lit.)
• Punto di fusione: −32 °C (lit.)
• Densità: 1.333 g/mL at 25 °C (lit.)
• Stringa SMILE: COS(=O)(=O)OC
• InChI: 1S/C2H6O4S/c1-5-7(3,4)6-2/h1-2H3; VAYGXNSJCAHWJZ-UHFFFAOYSA-N

Descrizione

Applicazioni

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.

Informazioni sulla sicurezza

• Pittogrammi: GHS06,GHS08,GHS05
• Avvertenze: Danger
• Indicazioni di pericolo: H301,H314,H317,H330,H341,H350
• Consigli di prudenza: P202 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classi di pericolo: Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Carc. 1B - Eye Dam. 1 - Muta. 2 - Skin Corr. 1B - Skin Sens. 1
• Codice della classe di stoccaggio: 6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• Classe di pericolosità dell'acqua (WGK): WGK 3
• Punto d’infiammabilità (°F): 181.4 °F - closed cup
• Punto d’infiammabilità (°C): 83 °C - closed cup
• Dispositivi di protezione individuale: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter