• British Pharmacopoeia Volume V
  • Appendices
  • Appendix I A. General Reagents

Dichloromethane
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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.

Fluorescence Under 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.