47675

Formaldehyde diethyl acetal

absolute, over molecular sieve (H₂O ≤0.01%), ≥99.0% (GC)

• Sinónimos: Diethoxymethane, Ethylal
• Fórmula lineal: CH₂(OC₂H₅)₂
• Número de CAS: 462-95-3
• Peso molecular: 104.15
• Beilstein: 1697253
• Número CE: 207-330-6
• Número MDL: MFCD00009246
• Código UNSPSC: 12352100
• ID de la sustancia en PubChem: 57651078
• NACRES: NA.22

Propiedades

• densidad de vapor: 3.6 (vs air)
• Nivel de calidad: 100
• presión de vapor: 60 mmHg ( 25 °C)
• grado: absolute
• Análisis: ≥99.0% (GC)
• formulario: liquid
• temp. de autoignición: 346 °F
• calidad: over molecular sieve (H₂O ≤0.01%)
• índice de refracción: n20/D 1.373 (lit.); n20/D 1.374
• bp: 87-88 °C (lit.)
• densidad: 0.831 g/mL at 25 °C (lit.)
• cadena SMILES: CCOCOCC
• InChI: 1S/C5H12O2/c1-3-6-5-7-4-2/h3-5H2,1-2H3
• Clave InChI: KLKFAASOGCDTDT-UHFFFAOYSA-N

Descripción

Descripción general

Formaldehyde diethyl acetal (FDEA, diethoxymethane, DEM) is a diethyl acetal. It has been synthesized from ethanol and aqueous formaldehyde. It is a low boiling solvent useful for sodium hydride reactions, organolithium chemistry, copper-catalyzed conjugate additions and phase-transfer reactions. It is a potential alternate for tetrahydrofuran, dichloromethane, glyme and methylal. DEM is an ethoxymethylating agent, a formaldehyde equivalent and a carbonylation substrate. Its condensation with 2-propylresorcinol to form resorcin[n]arenes (n=4–7) has been investigated. The IR and Raman spectra and conformations of DEM have been studied. NMR spectroscopy has been used to study the aggregation behavior of organolithium compounds in diethoxymethane. Unimolecular metastable decomposition of DEM upon electron impact has been studied. Solubility of non-polar gases in DEM has been evaluated.

Aplicación

Formaldehyde diethyl acetal may be used as a solvent in the esterification of carboxylic acids and in the O-alkylation of a variety of phenols.

Información de seguridad

• Pictogramas: GHS02
• Palabra de señalización: Danger
• Frases de peligro: H225
• Consejos de prudencia: P210 - P233 - P240 - P241 - P242 - P243
• Clasificaciones de peligro: Flam. Liq. 2
• Código de clase de almacenamiento: 3 - Flammable liquids
• Clase de riesgo para el agua (WGK): WGK 1
• Punto de inflamabilidad (°F): 23.0 °F - closed cup
• Punto de inflamabilidad (°C): -5 °C - closed cup
• Equipo de protección personal: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter