順酐有強烈刺激氣味。溶于乙醇、乙醚和丙酮，難溶于石油醚和四氯化碳。與熱水作用而成馬來酸。用于雙烯合成、制藥物、農藥、染料中間體及制聚酯樹脂、醇酸樹脂、馬來酸等有機酸，也用作脂肪和油防腐劑等。由苯經催化氧化，或由丁烯或丁烷用空氣氧化而制得。
Maleic anhydride has a strong pungent smell. Soluble in ethanol, ether and acetone, insoluble in petroleum ether and carbon tetrachloride. Maleic acid is formed by reacting with hot water. It is used in diene synthesis, medicine, pesticide, dye intermediate, polyester resin, alkyd resin, maleic acid and other organic acids, as well as fat and oil preservatives. It is prepared by catalytic oxidation of benzene or oxidation of butene or butane with air.
物理性質:白色片狀結晶，有強烈的刺激氣味、比重1.48、易升華、遇水易潮解生成馬來酸
Physical properties: white flake crystal, strong pungent smell, specific gravity 1.48, easy to sublimate, easy to deliquescence in water to form maleic acid
用途：主要用于不飽和樹脂、水處理劑油漆等
Application: mainly used for unsaturated resin, water treatment agent, paint, etc
質量標準：GB3676-92
Quality standard: gb3676-92
采標標準：Astmd:3504-96
Standard: astmd: 3504-96
外觀（Appearance）： 斜方晶系無色針狀或片狀結晶體
Appearance: orthorhombic colorless needle or flake crystal
物化性質(Physical Properties)
Physical properties
相對密度1.48，熔點52.8℃，沸點202.2℃，在較低溫度下(60-80℃)較易汽化，能溶于醇、乙醚和丙酮
The relative density is 1.48, the melting point is 52.8 ℃, the boiling point is 202.2 ℃, it is easy to vaporize at low temperature (60-80 ℃), and can be dissolved in alcohol, ether and acetone
順酐用于塑料工業用于制造增塑劑。造紙工業用于制造紙張處理劑。合成樹脂工業用于制造不飽和聚酯樹脂、醇酸樹脂等。涂料工業用于制造絕緣漆、白磁漆、烘漆、清漆等。農藥工業用于制造農藥馬拉松和低毒農藥4049等。醫藥工業用于制造長效磺胺藥。油脂工業用作脂肪、油的防腐劑。有機工業用于制造富馬酸及四氫呋喃等。分析化學中用作化學試劑。
Maleic anhydride is used in the plastics industry to make plasticizers. The paper industry is used to manufacture paper treatment agents. Synthetic resin industry is used to manufacture unsaturated polyester resin, alkyd resin, etc. The coating industry is used to manufacture insulating paint, white enamel, baking paint, varnish, etc. The pesticide industry is used to manufacture pesticide marathon and high efficiency and low toxicity pesticide 4049. The pharmaceutical industry is used to manufacture long-acting sulfonamides. The oil industry is used as a preservative for fats and oils. Organic industry is used to manufacture fumaric acid and tetrahydrofuran. Used as a chemical reagent in analytical chemistry.
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