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順酐（Maleic Anhydride）

Maleic Anhydride

定義：順酐，也稱為順丁烯二酸酐，是一種化學(xué)物質(zhì)，化學(xué)式為C4H2O3。

Definition: Maleic anhydride, also known as maleic anhydride, is a chemical substance with the chemical formula C4H2O3.

物理性質(zhì)：

physical property:

無(wú)色或白色晶體，具有強(qiáng)烈的刺激性氣味。

Colorless or white crystals with a strong irritating odor.

熔點(diǎn)為51-56℃，沸點(diǎn)為202℃。

The melting point is 51-56 ℃, and the boiling point is 202 ℃.

化學(xué)性質(zhì)：

chemical property:

可溶于乙醇、乙醚和丙酮，但難溶于石油醚和四氯化碳。

Soluble in ethanol, ether, and acetone, but insoluble in petroleum ether and carbon tetrachloride.

可以與熱水作用形成馬來(lái)酸。

It can react with hot water to form maleic acid.

馬來(lái)酸酐（Maleic Anhydride）

Maleic Anhydride

定義：馬來(lái)酸酐實(shí)際上就是順酐，又稱失水蘋果酸酐、順丁烯二酸酐。

Definition: Maleic anhydride is actually maleic anhydride, also known as dehydrated malic anhydride or maleic anhydride.

物理性質(zhì)（與順酐相同）：

Physical properties (same as maleic anhydride):

無(wú)色或白色晶體，具有強(qiáng)烈的刺激性氣味。

Colorless or white crystals with a strong irritating odor.

密度、熔點(diǎn)、沸點(diǎn)等物理常數(shù)與順酐相同。

The physical constants such as density, melting point, and boiling point are the same as those of maleic anhydride.

化學(xué)性質(zhì)（與順酐相同）：

Chemical properties (same as maleic anhydride):

可溶于水和多種有機(jī)溶劑。

Soluble in water and various organic solvents.

具有強(qiáng)烈的刺激性氣味。

Has a strong pungent odor.

在有機(jī)合成中，可用于制備多種化合物，如聚酯樹(shù)脂、醇酸樹(shù)脂等。

In organic synthesis, it can be used to prepare various compounds, such as polyester resin, alkyd resin, etc.

總結(jié)

summary

順酐和馬來(lái)酸酐實(shí)際上是同一種化學(xué)物質(zhì)，只是稱呼上有所不同。它們?cè)谖锢硇再|(zhì)和化學(xué)性質(zhì)上完全相同，都是無(wú)色或白色晶體，具有強(qiáng)烈的刺激性氣味，可用于多種有機(jī)合成和工業(yè)中。

Maleic anhydride and maleic anhydride are actually the same chemical substance, but their names are different. They have identical physical and chemical properties, both colorless or white crystals with strong pungent odors, and can be used in various organic synthesis and industrial production.

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