538280

Diethoxymethan

99.7%, contains 50-150 ppm BHT as stabilizer

• Synonym(e): Formaldehyddiethylacetal, Diethoxymethan, Ethylal
• Lineare Formel: CH₂(OC₂H₅)₂
• CAS-Nummer: 462-95-3
• Molekulargewicht: 104.15
• Beilstein: 1697253
• EG-Nummer: 207-330-6
• MDL-Nummer: MFCD00009246
• UNSPSC-Code: 12352112
• PubChem Substanz-ID: 329758005
• NACRES: NA.21

Eigenschaften

• Dampfdichte: 3.6 (vs air)
• Dampfdruck: 60 mmHg ( 25 °C)
• Assay: 99.7%
• Form: liquid
• Selbstzündungstemp.: 346 °F
• Enthält: 50-150 ppm BHT as stabilizer
• Expl.-Gr.: 8 %
• Brechungsindex: n20/D 1.373 (lit.)
• bp: 87-88 °C (lit.)
• mp (Schmelzpunkt): -66.5 °C
• Dichte: 0.831 g/mL at 25 °C (lit.)
• SMILES String: CCOCOCC
• InChI: 1S/C5H12O2/c1-3-6-5-7-4-2/h3-5H2,1-2H3
• InChIKey: KLKFAASOGCDTDT-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Diethoxymethane (DEM) is a dialkoxymethane that can be synthesized by reacting ethanol and aqueous formaldehyde using macroporous cation-exchange resin Indion-130 as a catalyst. Infrared spectra of the conformers of DEM in various states have been obtained by matrix isolation infrared spectroscopy. The characteristic properties of DEM include low boiling point, low affinity for water, base stability and does not need drying for any reactions. Its infrared and Raman spectra have been reported.

Anwendung

Diethoxymethane may be used as a substitute solvent to dichloromethane and toluene in the O-alkylation of different phenols in the presence of phase transfer catalysts (PTCs).

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): 23.0 °F - closed cup
• Flammpunkt (°C): -5 °C - closed cup