しゅう酸ジエチル 化学特性,用途語,生産方法
外観
無色澄明の液体
溶解性
水に微溶, エタノール, エーテルに易溶。エタノール及びアセトンに極めて溶けやすく、水に溶けにくい。エタノールと任意の割合に混ざる。エーテルに可溶。水に難溶。
解説
C6H10O4(146.14)．(COOC2H5)2．しゅう酸ジエチル, 単にシュウ酸エチルともいう．無水のシュウ酸を濃硫酸の存在下でエタノールと加熱すると得られる．無色の液体．融点－40.6 ℃，沸点97 ℃(2.6 kPa)．d204 1.0785．エタノール，エーテルに可溶．分析用試薬に用いられる．[CAS 95-92-1] 森北出版「化学辞典（第2版）
用途
1) 有機合成用試薬 2) セルロース、エステル、香料などの溶媒 3)分析用試薬 : 均一沈殿法によりマグネシウムをシュウ酸塩として沈殿させるとき用いる。
用途
ケトンのアシル化剤、セルロース、エステルなどの溶媒、分析用試薬、染料の原料。
用途
有機合成原料、溶剤。
化学的特性
colourless liquid
使用
Diethyl oxalate is used to prepare active pharmaceutical ingredients (API), plastics and dyestuff intermediates. It is also used as a solvent for cellulose esters, ethers, resins, perfumes and lacquers for electronics. It is involved in the transesterification reaction with phenol to get dipheny oxalate. It is also involved in the Claisen condensation ketosteroids to prepare glyoxalyl derivatives. Further, it is used to prepare sym-1,4-diphenyl-1,4-dihydro-1,2,4,5-polytetrazine. In addition to this, it is utilized in the microemulsion synthesis of zinc oxide nanoparticles.
調製方法
Diethyl oxalate is produced via esterification of ethanol and
oxalic acid. It is a preferred solvent for cellulose acetate and
nitrate.
一般的な説明
A colorless liquid. Flash point 168°F. Slightly denser than water and insoluble in water. Hence sinks in water. May irritate skin and mucous membranes; may be mildly toxic by ingestion; may emit irritating fumes in a fire. Vapors are much heavier than air. Used as a solvent for plastics and in the manufacture of perfumes and pharmaceuticals.
空気と水の反応
Insoluble in water.
反応プロフィール
Diethyl oxalate is an ester. Esters react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides
危険性
Toxic by ingestion, strong irritant to skin
and mucous membranes.
健康ハザード
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Contact with molten substance may cause severe burns to skin and eyes. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
火災危険
Combustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
安全性プロファイル
Poison by ingestion.
Flammable liquid when exposed to heat or
flame; can react with oxidzing materials. To
fight fire, use foam, CO2, dry chemical.
When heated to decomposition it emits
acrid smoke and fumes. See also
OXALATES and ESTERS.
しゅう酸ジエチル 上流と下流の製品情報
原材料
準備製品