二氯甲烷简称DCM，化学式CH2CL2，常温下是一种无色透明、比水重、易挥发的液体，微溶于水，与绝大多数常用的有机溶剂互溶，具有类似醚的刺激性气味。二氯甲烷沸点低，在工业生产时容易挥发造成环境污染。
Dichloromethane, abbreviated as DCM, with chemical formula CH2Cl2, is a colorless, transparent, water-specific, volatile liquid at room temperature. It is slightly soluble in water and miscible with most commonly used organic solvents. It has a pungent smell similar to ether. Dichloromethane has a low boiling point and is easy to volatilize in industrial production, causing environmental pollution.
由于溶解能力强、沸点低、相对低毒性和反应惰性，长期以来一直是多种应用的首*溶剂。
Due to its strong solubility, low boiling point, relatively low toxicity and inert reaction, it has been the first solvent for many applications for a long time.
例如在制药工业中作为反应介质，用于制备氨苄青霉素、羟苄青霉素和先锋霉素等；
For example, as a reaction medium in the pharmaceutical industry, it is used to prepare ampicillin, hydroxybenzylpenicillin and vancomycin;
也用于胶片生产中的溶剂；还可用作石油脱蜡溶剂、气溶胶推进剂、有机合成萃取剂、聚氨酯等泡沫塑料生产用发泡剂和金属清洗剂等。
Also used as solvent in film production; It can also be used as oil dewaxing solvent, aerosol propellant, organic synthetic extractant, foaming agent for foam plastic production such as polyurethane and metal cleaning agent.
二氯甲烷在我国主要用于胶片生产的消费量占总消费量的50%，医药方面占总消费量的20%，清洗剂及化工行业消费量占总消费量的20%，其他方面占10%。
The consumption of dichloromethane mainly used in film production accounts for 50% of the total consumption in China, medicine accounts for 20% of the total consumption, cleaning agent and chemical industry accounts for 20% of the total consumption, and other aspects account for 10%.
工业上二氯甲烷一般使用天然气和氯气反应制得，是一种优良的有机溶剂，经常用来代替易燃品（如石油醚和乙醚）。此外，由于毒性很小，且中毒后苏醒较快，故可用作麻醉剂。
In industry, dichloromethane is generally prepared by the reaction of natural gas and chlorine. It is an excellent organic solvent and is often used to replace inflammables (such as petroleum ether and ether). In addition, it can be used as an anesthetic because of its low toxicity and rapid recovery after poisoning.
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