Dichloromethane (DCM or methylene chloride) is the organic compound with the formula CH2Cl2. This colorless, volatile liquid with a moderately sweet aroma is widely used as a solvent. More than 500,000 tons were produced in 1991. Although it is not miscible with water, it is miscible with many organic solvents.[1] It was first prepared in 1840 by the French chemist Henri Victor Regnault, who isolated it from a mixture of chloromethane and chlorine that had been exposed to sunlight.
http://en.wikipedia.org/wiki/Dichloromethane
http://ntp.niehs.nih.gov/ntp/roc/eleventh/profiles/s066dich.pdf
http://www.jtbaker.com/msds/englishhtml/D2895.htm
http://msds.chem.ox.ac.uk/DI/dichloromethane.html
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