47675

ホルムアルデヒドジエチルアセタール

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

• 別名: エチラール, ジエトキシメタン
• 化学式: CH₂(OC₂H₅)₂
• CAS番号: 462-95-3
• 分子量: 104.15
• Beilstein: 1697253
• EC Number: 207-330-6
• MDL番号: MFCD00009246
• UNSPSCコード: 12352100
• PubChem Substance ID: 57651078
• NACRES: NA.22

特性

• 蒸気密度: 3.6 (vs air)
• 品質水準: 100
• 蒸気圧: 60 mmHg ( 25 °C)
• グレード: absolute
• アッセイ: ≥99.0% (GC)
• 形状: liquid
• 自己発火温度: 346 °F
• 品質: over molecular sieve (H₂O ≤0.01%)
• 屈折率: n20/D 1.373 (lit.); n20/D 1.374
• bp: 87-88 °C (lit.)
• 密度: 0.831 g/mL at 25 °C (lit.)
• SMILES記法: CCOCOCC
• InChI: 1S/C5H12O2/c1-3-6-5-7-4-2/h3-5H2,1-2H3
• InChI Key: KLKFAASOGCDTDT-UHFFFAOYSA-N

詳細

詳細

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.

アプリケーション

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.

安全性情報

• ピクトグラム: GHS02
• シグナルワード: Danger
• 危険有害性情報: H225
• 注意書き: P210 - P233 - P240 - P241 - P242 - P243
• 危険有害性の分類: Flam. Liq. 2
• 保管分類コード: 3 - Flammable liquids
• WGK: WGK 1
• 引火点(°F): 23.0 °F - closed cup
• 引火点(℃): -5 °C - closed cup
• 個人用保護具 (PPE): Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter