538280

Diethoxymethane

99.7%, contains 50-150 ppm BHT as stabilizer

• Synonyme(s) : Formaldehyde diethyl acetal, Diethoxymethane, Ethylal
• Formule linéaire : CH₂(OC₂H₅)₂
• Numéro CAS: 462-95-3
• Poids moléculaire : 104.15
• Numéro Beilstein : 1697253
• Numéro CE : 207-330-6
• Numéro MDL: MFCD00009246
• Code UNSPSC : 12352112
• ID de substance PubChem : 329758005
• Nomenclature NACRES : NA.21

Propriétés

• Densité de vapeur: 3.6 (vs air)
• Niveau de qualité: 200
• Pression de vapeur: 60 mmHg ( 25 °C)
• Pureté: 99.7%
• Forme: liquid
• Température d'inflammation spontanée: 346 °F
• Contient: 50-150 ppm BHT as stabilizer
• Limite d'explosivité: 8 %
• Indice de réfraction: n20/D 1.373 (lit.)
• Point d'ébullition: 87-88 °C (lit.)
• Pf: -66.5 °C
• Densité: 0.831 g/mL at 25 °C (lit.)
• Chaîne SMILES: CCOCOCC
• InChI: 1S/C5H12O2/c1-3-6-5-7-4-2/h3-5H2,1-2H3
• Clé InChI: KLKFAASOGCDTDT-UHFFFAOYSA-N

Description

Description générale

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.

Application

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).

Informations sur la sécurité

• Pictogrammes: GHS02
• Mention d'avertissement: Danger
• Mentions de danger: H225
• Conseils de prudence: P210 - P233 - P240 - P241 - P242 - P243
• Classification des risques: Flam. Liq. 2
• Code de la classe de stockage: 3 - Flammable liquids
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): 23.0 °F - closed cup
• Point d'éclair (°C): -5 °C - closed cup