順丁烯二酸酐，又名馬來酸酐或失水蘋果酸酐，常簡稱順酐。分子式為C4H2O3，分子量為98.06。無色結晶，有強烈刺激氣味，凝固點52.8℃，沸點202℃，易升華。主要由苯或碳四餾分中的正丁烷或丁烯氧化而制得，是生產不飽和聚酯及有機合成的原料。
Maleic anhydride, also known as maleic anhydride or dehydrated malic anhydride, is often referred to as maleic anhydride. The molecular formula is c4h2o3 and the molecular weight is 98.06. Colorless crystal, strong pungent smell, freezing point 52.8 ℃, boiling point 202 ℃, easy sublimation. It is mainly prepared by oxidation of n-butane or butene in benzene or C4 fraction. It is the raw material for the production of unsaturated polyester and organic synthesis.
性質與穩定性
Properties and stability
1.避免接觸潮濕空氣。避免與強氧化劑、強還原劑、強酸、強堿、堿金屬、水接觸。
1. Avoid contact with humid air. Avoid contact with strong oxidant, strong reducing agent, strong acid, strong alkali, alkali metal and water.
斜方晶系無色針狀或片狀結晶體。溶于水生成順丁烯二酸。溶于乙醇并生成酯。
Orthorhombic crystal is colorless acicular or flaky crystal. It is soluble in water to form maleic acid. It dissolves in ethanol and forms ester.
溶于乙醇、乙醚等多種有機溶劑，難溶于石油醚和四氯化碳。與熱水作用生成順丁烯二酸。易于烯類單體進行共聚反應；也可進行均聚。與二元醇反應生成線型不飽和聚酯，與三氧化硫反應生成磺化順丁烯二酸酐?？扇肌Ｓ卸?，濺及皮膚時要用大量清水沖洗。生產設備要密閉，操作人員要穿戴好防護用具。
It is soluble in ethanol, ether and other organic solvents, but insoluble in petroleum ether and carbon tetrachloride. It reacts with hot water to form maleic acid. It is easy to carry out copolymerization of olefin monomers and homopolymerization. Linear unsaturated polyester was formed by reaction with diols, and sulfonated maleic anhydride was formed by reaction with sulfur trioxide. Combustible. Toxic. Wash with plenty of water when splashing on skin. The production equipment should be sealed and the operators should wear protective equipment.
2.本品有毒。其毒性比順酸大，能刺激皮膚及黏膜。當人體接觸高溫液體時，其刺激性更為嚴重，能造成皮膚灼燒至傷，結膜、角膜紅腫，嚴重時導致視力減退甚至失明。對大鼠經服LD50為400mg/kg。小鼠經口LD5060~465mg/kg。當濺及皮膚時要用大量清水沖洗。生產設備要密閉，操作人員要穿戴好防護用具。
2. This product is poisonous. It is more toxic than CIS acid and can stimulate skin and mucous membrane. When the human body is exposed to high temperature liquid, its irritation is more serious, which can cause skin burn to injury, conjunctiva, corneal redness and swelling, and even lead to vision loss or blindness. The LD50 of rats was 400 mg / kg. Ld5060 ~ 465mg / kg by oral administration in mice. When splashing on the skin, rinse with plenty of water. The production equipment should be sealed and the operators should wear protective equipment.
3.存在于煙氣中。
3. Exist in flue gas.
4.強烈的刺激性，引起燒傷，吸入可引起肺水腫。
4. Strong irritation, cause burns, inhalation can cause pulmonary edema.
