47675

二乙醇缩甲醛

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

• 别名: 二乙氧基甲烷, 甲醛缩二乙醇
• 线性分子式: CH₂(OC₂H₅)₂
• CAS号: 462-95-3
• 分子量: 104.15
• Beilstein: 1697253
• EC號碼: 207-330-6
• MDL號碼: MFCD00009246
• 分類程式碼代碼: 12352100
• PubChem物質ID: 57651078
• NACRES: NA.22

属性

• 蒸汽密度: 3.6 (vs air)
• 品質等級: 100
• 蒸汽壓力: 60 mmHg ( 25 °C)
• 等級: absolute
• 化驗: ≥99.0% (GC)
• 形狀: liquid
• 自燃溫度: 346 °F
• 品質: over molecular sieve (H₂O ≤0.01%)
• 折射率: 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 字串: CCOCOCC
• InChI: 1S/C5H12O2/c1-3-6-5-7-4-2/h3-5H2,1-2H3
• InChI 密鑰: KLKFAASOGCDTDT-UHFFFAOYSA-N

说明

一般說明

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.

應用

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.

安全信息

• 象形圖: GHS02
• 訊號詞: Danger
• 危險聲明: H225
• 防範說明: P210 - P233 - P240 - P241 - P242 - P243
• 危險分類: Flam. Liq. 2
• 儲存類別代碼: 3 - Flammable liquids
• 水污染物質分類（WGK）: WGK 1
• 閃點（°F）: 23.0 °F - closed cup
• 閃點（°C）: -5 °C - closed cup
• 個人防護裝備: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter