| 1 | Description | A clear, colorless, odorless, hygroscopic liquid. | A clear, colorless, odorless, hygroscopic liquid. | USP/In-house |
| 2 | Solubility | Complies | Soluble in water. | USP/In-house |
| 3 | Identification A (By IR) | Complies | IR spectra of the sample should be concomittant with IR spectra of the corresponding standard | USP |
| 4 | Identification B (By Chemical test) | Complies | A deep violet, crystalline solid should obtaine which should soluble in chloroform, yielding a red solution. | USP |
| 5 | Specific gravity (25°C) | 1.097 | Between 1.095 to 1.101 | USP |
| 6 | Refractive index (25°C) | 1.4769 | Between 1.4755 and 1.4775 | USP |
| 7 | Acidity | 1.1ml of 0.01N sodium hydroxide consumed | NMT 5.0ml of 0.01N sodium hydroxide should consume | USP |
| 8 | Water | 0.032% | NMT 0.1% | USP |
| 9 | UV absorbance profile (10mm cell)@270nm-350nm | Complies | The spectrum is smooth with no absorption maxima. | USP |
| 10 | UV absorbance profile (10mm cell)@275nm | 0.096 | NMT 0.20 | USP |
| 11 | UV absorbance ratio (A285nm/A275nm) | 0.39 | NMT 0.65 | USP |
| 12 | UV absorbance ratio (A295nm/A275nm) | 0.23 | NMT 0.45 | USP |
| 13 | Limit of Non volatile residue | 0.0012% | NMT 0.01% | USP |
| 14 | Related compounds : Total impurities | 0.002% | NMT 0.1% | USP |
| 15 | Dimethyl sulfone (By GC) | Not detected | NMT 0.03% | In-house |
| 16 | Assay (Anhydrous basis) | 99.98% | NLT 99.9% | USP |