一、順酐的定義及性質

1、 Definition and properties of maleic anhydride

順酐，化學式為C4H8O2，它是一種無色透明的液體，也稱為環氧己烷。其分子中含有一個環氧基，具有較強的親核性和親電性，可以和許多分子發生反應。順酐具有微弱的香氣，有毒，易揮發，可起到麻醉作用。

Maleic anhydride, with the chemical formula C4H8O2, is a colorless and transparent liquid, also known as epoxide hexane. Its molecule contains an epoxy group, which has strong nucleophilicity and electrophilicity and can react with many molecules. Maleic anhydride has a weak aroma, is toxic, volatile, and can act as an anesthetic.

二、順酐的用途

2、 The use of maleic anhydride

順酐是重要的有機合成原料，廣泛應用于醫藥、農藥、涂料、樹脂、橡膠、塑料和香料等工業領域。其中，以聚酰亞胺纖維和聚酰亞胺膜為主要用途，是高檔電器絕緣材料、高溫結構材料、航天用途材料的重要組成部分。

Maleic anhydride is an important organic synthetic raw material, widely used in industrial fields such as medicine, pesticides, coatings, resins, rubber, plastics, and spices. Among them, the main purpose is to produce polyimide fibers and polyimide films, which are important components of high-end electrical insulation materials, high-temperature structural materials, and aerospace materials.

三、順酐的密度

3、 Density of maleic anhydride

順酐的密度為1.009 g/cm?（25℃），比水密度稍大。其密度與溫度有關，在不同溫度下的密度不同。隨溫度升高，順酐的密度逐漸減小。

Is the density of maleic anhydride 1.009 g/cm? (25 ℃), slightly higher than water density. Its density is related to temperature, and the density varies at different temperatures. As the temperature increases, the density of maleic anhydride gradually decreases.

四、順酐的應用價值

4、 The application value of maleic anhydride

順酐作為一種重要的有機合成原料，在工業中具有廣泛的應用價值。在制備聚酰亞胺等高分子材料方面，順酐是不可或缺的原料。同時，順酐還可以應用于香料、涂料、樹脂、橡膠等領域，具有特殊的應用價值。此外，順酐還可以被用作麻醉藥和殺蟲劑等醫藥和農藥領域。

Maleic anhydride, as an important organic synthesis raw material, has broad application value in industrial production. In the preparation of polymer materials such as polyimide, maleic anhydride is an indispensable raw material. Meanwhile, maleic anhydride can also be applied in fields such as spices, coatings, resins, rubber, etc., with special application value. In addition, maleic anhydride can also be used as an anesthetic and insecticide in the fields of medicine and pesticides.