Dichloromethane CAS NO 75-09-2 as Industrial raw materials origin from China

Dichloromethane CAS NO 75-09-2 as Industrial raw materials origin from China.
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Name:   Dichloromethane (Methylene chloride)             
CAS No.:  75-09-2
Appearance: Colorless transparent liquid with aromatic odor
Molecular formula:  CH2Cl2
Molecular Weight:   84.93
Density: 1.325
Melting point: -97℃
Boiling point: 39-40℃
Water solubility: 20 g/L (20℃)
Heat of combustion (kJ/mol): 604.9
Critical temperature (℃): 237
Critical pressure (MPa): 6.08
Ignition temperature (℃): 615
Upper explosion limit %(V/V): 19
Lower explosion limit %(V/V): 12
Molecular structure:

Description:

Dichloromethane is a compound produced by replacing two hydrogen atoms in methane molecules with chlorine, with the molecular formula CH2Cl2. It is a colorless, transparent, heavier than water, and volatile liquid. It has an ether-like smell and sweetness. It does not burn, but it forms an explosive mixture after mixing with high-concentration oxygen. Dichloromethane is slightly soluble in water, miscible with most common organic solvents, and miscible with other chlorine-containing solvents, ether, ethanol and N,N-dimethylformamide in any proportion. Dichloromethane is hard to dissolve in liquid ammonia at room temperature, and can quickly dissolve in phenol, aldehyde, ketone, glacial acetic acid, triethyl phosphate, formamide, cyclohexylamine, and ethyl acetoacetate. It is often used to replace flammable petroleum ether, ether, etc.

Application：

Dichloromethane has the advantages of strong solubility and low toxicity. It is widely used in the manufacture of safety film and polycarbonate, and the rest is used as coating solvent, metal degreasing agent, aerosol spraying agent, polyurethane foaming agent, mold release agent, and release agent. Lacquer.

Dichloromethane is a colorless liquid. It is used as a reaction medium in the pharmaceutical industry to prepare ampicillin, ampicillin and cephalosporin; it is also used as a solvent in film production, petroleum dewaxing solvent, aerosol propellant, Organic synthetic extractant, foaming agent used in the production of foam plastics such as polyurethane, and metal cleaning agent.

Dichloromethane is also used to make decaffeinated coffee. The coffee is first steamed to dissolve the caffeine and float on the surface, and then use methylene chloride to remove the caffeine.

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