Methylene chloride USP/Ph.Eur 25LT Go Back

CASR

: 75-09-2

Molecular Formula

: ClCH2Cl

Molecular Weight

: 84.93
Specifications  
Appearance: Clear,colourless, volatile liquid having an odor resembling that of chloroform.
Solubility: Sparingly soluble in water, miscible with ethanol (96%) alcohol, with ether, and with fixed and volatile oils.
Identification A (Relative density, 20°C): 1.320 to 1.332
Identification B (Refractive index, 20±0.5°C): 1.423 to 1.425
Identification C (By IR): IR Spectra of the sample should be concomitant with IR spectra of the corresponding standard
Identification D (By chemical test): A violet color should produce
Identification E (By Chemical test): The precipitate should dissolve easily with the possible exception of a few large particles which dissolve slowly
Appearance of solution: Clear and colorless
Relative density, 20°C: 1.320 to 1.332
Specific gravity,25°C: Between 1.318 to 1.322
Refractive index, 20°C ± 0.5°C: 1.423 to 1.425
Assay: NLT 99.0%
Acidity: Not more than 0.15 mL of 0.1M sodium hydroxide is required to change the color of the indicator to blue
Limit of hydrogen chloride: NMT 0.001%
Free Chlorine (Cl): The lower layer does not show a violet tint
Ethanol, 2-methylbut-2-ene and volatile impurities: Ethanol: NMT 2.0% v/v
Ethanol, 2-methylbut-2-ene and volatile impurities: 2-methylbut-2-ene: NMT 300 ppm v/v
Impurity A (Carbon tetrachloride): NMT 4 ppm v/v
Impurity B (Chloroform): NMT 50 ppm v/v
Sum of impurities other than ethanol and 2-methylbut-2-ene: NMT 0.1% v/v
Limit of Nonvolatile residue: NMT 0.002%.; NMT 1mg of residue
Water: NMT 0.02% m/m
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