相對密度1.3266(20/4℃)水溶性 20 G/L (20 C) 溶解性 溶于約50倍的水,溶于酚、醛、酮、冰醋酸、磷酸三乙酯、乙酰乙酸乙酯、環(huán)己胺.與其他氯代烴溶劑乙醇、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

熱解后產(chǎn)生HCl和痕量的光氣,與水長期加熱,生成甲醛和HCl.進一步氯化,可得CHCl3和CCl4.無色易揮發(fā)液體.難燃燒.蒸氣與空氣形成爆炸性混合物,爆炸極限6.2％～15.0％（體積）.二氯甲烷與氫氧化鈉作用生成甲醛.工業(yè)中,二氯甲烷由天然氣與氯氣反應制得,經(jīng)過精餾得到純品,是優(yōu)良的有機溶劑,常用來代替易燃的石油醚、乙醚等,并可用作牙科局部麻醉劑、制冷劑和滅火劑等.對皮膚和粘膜的刺激性比氯仿稍強,使用高濃度二氯甲烷時應注意.
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
包裝儲運 用鍍鋅鐵桶密閉包裝,每桶250kg,火車槽車、汽車均可運輸.應貯存在冷暗干燥、通風良好的地方,注意防潮.主要用途 用作樹脂及塑料工業(yè)的溶劑
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