Methylene Chloride

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methylene chloride

[′meth·ə‚lēn ′klȯr‚īd]
(organic chemistry)
CH2Cl2 A colorless liquid, practically nonflammable and nonexplosive; used as a refrigerant in centrifugal compressors, a solvent for organic materials, and a component in nonflammable paint-remover mixtures.

Methylene Chloride

 

CH2C12; a colorless liquid with an odor similar to that of chloroform. Boiling point, 40°C ; density, 1.3255 g/cm3 at 20°C . It is miscible with organic solvents; its solubility in water is 1.32 g per 100 g at 25°C . Methylene chloride reacts with water to form an azeotrope (boiling point, 38. TC; 98.5 percent CH2C12).

Methylene chloride is prepared commercially by chlorination of methane, which also produces methyl chloride and chloroform. It is used as a solvent for plastics, rubber, cellulose esters, and fats, as well as in the extraction of essential oils. Methylene chloride has a mild narcotic effect.

References in periodicals archive ?
Dichloromethane showed better percent recovery in both extraction techniques and was selected for extraction of analytes from the biological samples.
If dichloromethane concentrations stay at current levels, then the delay in recovery would be only five years.
Different compositions of mobile phase of dichloromethane and methanol (see Table 1) have been tried but didn't produce any better result.
Consistent with other chlorinated solvents such as trichloroethylene and tetrachloroethylene, exposure to dichloromethane results in decreased motor activity, impaired memory, and changes in responses to sensory stimuli in mice and rats (reviewed by Bale et al.
ciliata stems, leaves and fruits did not reduce larval survival, but dichloromethane fractions of leaves and fruits affected the larvae development (Table 2).
5 in the case of chloroform which is exactly the opposite of the results obtained with dichloromethane where E % values of Cu2+ are lower than those of Mn2+ Co2+ Zn2+ and Pb2+ between pH 3.
Maratauira riverside, Belem, PA, Brazil Hexane and Rainy season Guama nverside, Ethanol (April/2007) Belem, PA, Brazil extracts of stems and hexane, dichloromethane and ethyl acetate fractions of ethanol extract.
The methanol extract (ME) possessed the highest antioxidant activity followed by the methanol-water (MW) extract and finally dichloromethane extract (DCM) which showed the lowest potential.
The lasalocid contained in the aqueous methanol supernatant was extracted with 12 mL of dichloromethane (DCM).
On 23 November 2012, Enviro Strip (UK) Limited was found to have discharged above the permitted limit for zinc and dichloromethane.
An aqueous solution (B) of sodium lauryl sulphate (2 g) in distilled water (20 ml) was added drop-wise with magnetic stirring to the organic phase (A) obtained by mixing the solution of polyvinylpyrrolidone (PVP) (2 g) in dichloromethane (20 ml) with the solution of technical grade larvicide (0.