Dichloromethane

Methylene chloride; CH₂Cl₂ = 84.9 (75-09-2)

Colourless liquid, sparingly soluble in water, miscible with ethanol (96%).

Boiling point, 39° to 42°.

Methylene chloride used in fluorimetry complies with the following additional test.

FluorescenceUnder irradiation at 365 nm, the fluorescence (2.2.21) measured at 460 nm in a 1 cm cell is not more intense than that of a solution containing 0.002 ppm of quinine in 0.5 M sulfuric acid measured in the same conditions.