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Technical Data Sheet Dimethyl sulfoxide
Compound Information
Product Name:
Dimethyl sulfoxide
CAS No.:
67-68-5
Molecular Formula:
C2H6OS
Molecular Weight:
78.13
Revision Date:
2026-04-16
Analytical Information
| Tests | Specifications |
|---|---|
| Grade | USP/Ph.Eur |
| Appearance | colorless liquid |
| Solubility | H2O: miscible (completely) |
| Identification (By chemical test 1) | A deep violet, crystalline solid should obtaine which should 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. |
| Identification (by Relative density, 20°C) | 1.100-1.104 |
| Identification (By Refractive index, 20±0.5°C) | 1.478-1.480 |
| 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 5.0ml of 0.01N sodium hydroxide should consume |
| Water | 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 |
| Limit of Non volatile residue | NMT 0.01% |
| Related compunds / Related substances - Total impurities | NMT 0.10% |
| Related substance (Unspecified impurities) | NMT 0.10% |
| Purity | NLT 99.9% |
| Total aerobic microbial count | NMT 1000 CFU/mL |
| Total Yeast and mold count | NMT 100 CFU/mL |
| MS | Pass test |
| 1H NMR | Pass test |
| 13C NMR | Pass test |
| IR | Pass test |
| Raman | Pass test |
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