Dimethyl sulphoxide CDMF PARENTEX 2LT Go Back


: 67-68-5

Molecular Formula

: C2H6OS

Molecular Weight

: 78.13
Appearance/Description: A colorless liquid
Solubility: Miscible with water, ethanol and ether, insoluble in alkane
Identification (By IR): IR spectra of the sample should be concomitant with IR spectra of standard
Identification (By chemical test 1): A deep violet, crystalline solid should obtain which should be soluble in chloroform, yielding a red solution.
Identification (By chemical test 2): The colour changes to green or bluish- green. Cool. The colour changes to greenish yellow.
Specific gravity, 25°C: Between 1.095 to 1.101
Relative density, 20°C: 1.100 - 1.104
Refractive index (20°C ± 0.5°C): 1.478 - 1.480
Refractive index, 25°C: 1.4755 - 1.4775
Freezing point: NLT 18.3°C
Acidity: Not more than 5.0 ml of 0.01N sodium hydroxide should consume
Water (By KF): NMT 0.1%
UV absorbance profile (10mm cell)@270nm-350nm: The spectrum is smooth with no absorption maxima
UV absorbance ratio (A285nm/A275nm): NMT 0.65
UV absorbance ratio (A295nm/A275nm): NMT 0.45
UV absorbance profile (10mm cell)@275nm: NMT 0.20
UV absorbance profile (10mm cell)@285nm: NMT 0.20
UV absorbance profile (10mm cell)@295nm: NMT 0.20
Substance darkened by potassium hydroxide: The absorbance of the solution at 350nm, not more than 0.023
Limit of Non-volatile residue: NMT 0.01%
Related compounds / Related substances – Dimethyl sulfone: NMT 0.10%
Related compunds / Related substances - Total impurities: NMT 0.1%
Assay (Anhydrous basis): NLT 99.9%
Total aerobic microbial count: NMT 1000 CFU/ml
Total combined yeast and mould count: NMT 100 CFU/ml
Bacterial endotoxin: NMT 2.5 EU/ml
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