顺酐有强烈刺激气味。溶于乙醇、乙醚和丙酮，难溶于石油醚和四氯化碳。与热水作用而成马来酸。用于双烯合成、制药物、农药、染料中间体及制聚酯树脂、醇酸树脂、马来酸等有机酸，也用作脂肪和油防腐剂等。由苯经催化氧化，或由丁烯或丁烷用空气氧化而制得。
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.
物理性质:白色片状结晶，有强烈的刺激气味、比重1.48、易升华、遇水易潮解生成马来酸
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：主要用于不饱和树脂、水处理剂油漆等
Application: mainly used for unsaturated resin, water treatment agent, paint, etc
质量标准：GB3676-92
Quality standard: gb3676-92
采标标准：Astmd:3504-96
Standard: astmd: 3504-96
外观（Appearance）： 斜方晶系无色针状或片状结晶体
Appearance: orthorhombic colorless needle or flake crystal
物化性质(Physical Properties)
Physical properties
相对密度1.48，熔点52.8℃，沸点202.2℃，在较低温度下(60-80℃)较易汽化，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
顺酐用于塑料工业用于制造增塑剂。造纸工业用于制造纸张处理剂。合成树脂工业用于制造不饱和聚酯树脂、醇酸树脂等。涂料工业用于制造绝缘漆、白磁漆、烘漆、清漆等。农药工业用于制造农药马拉松和低毒农药4049等。医药工业用于制造长效磺胺药。油脂工业用作脂肪、油的防腐剂。有机工业用于制造富马酸及四氢呋喃等。分析化学中用作化学试剂。
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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