47675

Formaldehyde diethyl acetal

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

• 동의어(들): Diethoxymethane, Ethylal
• Linear Formula: CH₂(OC₂H₅)₂
• CAS Number: 462-95-3
• Molecular Weight: 104.15
• Beilstein: 1697253
• EC Number: 207-330-6
• MDL number: MFCD00009246
• UNSPSC 코드: 12352100
• PubChem Substance ID: 57651078
• NACRES: NA.22

속성

• vapor density: 3.6 (vs air)
• vapor pressure: 60 mmHg ( 25 °C)
• grade: absolute
• 분석: ≥99.0% (GC)
• 형태: liquid
• autoignition temp.: 346 °F
• 품질: over molecular sieve (H₂O ≤0.01%)
• refractive index: n20/D 1.373 (lit.); n20/D 1.374
• bp: 87-88 °C (lit.)
• density: 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
• InChI key: KLKFAASOGCDTDT-UHFFFAOYSA-N

설명

일반 설명

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.

애플리케이션

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.

안전성 정보

• 픽토그램: GHS02
• 신호어: Danger
• 유해 및 위험 성명서: H225
• 예방조치 성명서: P210 - P233 - P240 - P241 - P242 - P243
• Hazard Classifications: Flam. Liq. 2
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 1
• Flash Point (°F): 23.0 °F - closed cup
• Flash Point (°C): -5 °C - closed cup
• 개인 보호 장비: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter