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二氯甲烷的作用性质以及用途

发布来源:http://www.elcastone.com    更新时间:2020-11-26 点击数:

相对密度1.3266(20/4℃)水溶性 20 G/L (20 C) 溶解性 溶于约50倍的水,溶于酚、醛、酮、冰醋酸、磷酸三乙酯、乙酰乙酸乙酯、环己胺.与其他氯代烃溶剂乙醇、乙醚和N,N-二甲基甲酰胺混溶

The relative density is 1.3266 (20 / 4 ℃), water solubility is 20 g / L (20 C), solubility is about 50 times of water, soluble in phenol, aldehyde, ketone, glacial acetic acid, triethyl phosphate, ethyl acetoacetate, cyclohexylamine. It is miscible with other chlorinated hydrocarbon solvents ethanol, ether and n, N-dimethylformamide

热解后产生HCl和痕量的光气,与水长期加热,生成甲醛和HCl.进一步氯化,可得CHCl3和CCl4.无色易挥发液体.难燃烧.蒸气与空气形成爆炸性混合物,爆炸极限6.2%~15.0%(体积).二氯甲烷与氢氧化钠作用生成甲醛.工业中,二氯甲烷由天然气与氯气反应制得,经过精馏得到纯品,是优良的有机溶剂,常用来代替易燃的石油醚、乙醚等,并可用作牙科局部麻醉剂、制冷剂和灭火剂等.对皮肤和粘膜的刺激性比氯仿稍强,使用高浓度二氯甲烷时应注意.
After pyrolysis, HCl and trace phosgene are produced, which are heated with water for a long time to form formaldehyde and HCl. Further chlorination gives CHCl3 and CCl4. Colorless and volatile liquid is difficult to burn. Vapor and air form explosive mixture with explosion limit of 6.2% - 15.0% (volume). Dichloromethane reacts with sodium hydroxide to form formaldehyde. In industry, dichloromethane is prepared by reaction of natural gas and chlorine gas, It is a good organic solvent and can be used as dental local anesthetics, refrigerants and fire extinguishing agents. It is slightly more irritating to skin and mucous membrane than chloroform. It should be noted when using high concentration dichloromethane
包装储运 用镀锌铁桶密闭包装,每桶250kg,火车槽车、汽车均可运输.应贮存在冷暗干燥、通风良好的地方,注意防潮.主要用途 用作树脂及塑料工业的溶剂
It should be stored in cold, dark, dry and well ventilated place. It should be moisture-proof. It is mainly used as solvent in resin and plastic industry

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