Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Dimethyl sulphoxide
1. Basic Information
Name: Dimethyl sulphoxide
Alias: DMSO, Methyl sulfoxide, Dimethyl sulfoxide
CAS No.: 67-68-5
Molecular Formula: C2H6OS
Molecular Weight: 78.13
Category: Polar aprotic solvent, pharmaceutical auxiliary, industrial organic raw material
2. Physical and Chemical Properties
Physical Properties
- Appearance: Colorless transparent viscous liquid
- Odor: Faint slight garlic odor after skin absorption, nearly odorless pure product
- Solubility: Miscible with water, ethanol, acetone, ether, chloroform; dissolves most organic/inorganic compounds
- Melting Point: 18.4 ℃
- Boiling Point: 189 ℃ (decomposes slightly)
- Density (20℃): 1.100–1.104 g/cm3
- Refractive Index nD20: 1.479
- Flash Point: 95 ℃
- Hygroscopy: Strongly hygroscopic, rapidly absorbs water vapor in air
- Aqueous property: Neutral solvent, stable in full pH range 3–11
Chemical Properties
- Molecular structure: Sulfoxide functional group with two methyl groups, strong polar aprotic structure
- Super dissolving power: Dissolves polymers, drugs, metal salts, natural extracts; known as "universal solvent"
- Penetration characteristic: Strong transdermal penetration, carries solute through skin/mucous membrane
- Thermal stability: Stable below 150 ℃; high temperature decomposes to dimethyl sulfide and formaldehyde
- Photostability: Slightly sensitive to long-term strong UV light, turns light yellow gradually
- Compatibility: Compatible with most polar solvents, neutral raw materials; incompatible with strong oxidants, acid chlorides, sodium hydride
3. Main Application Fields
1. Pharmaceutical & Biochemical Solvent (Core Application)
Dissolution medium for API, drug synthesis reaction solvent; cell culture cryoprotectant for biological samples
2. Industrial Synthetic Solvent
Polymer spinning solvent, pesticide synthesis medium, resin reaction diluent, electronic component cleaning agent
3. Medical External Auxiliary
Carrier for external ointment, transdermal absorption accelerator for skin topical preparations
4. Laboratory Research Reagent
Universal solvent for organic chemistry, spectral analysis, extraction separation experiments
4. Quality Specification Table
| Test Item | Standard Specification |
| CAS Number | 67-68-5 |
| Molecular Formula | C2H6OS |
| Appearance | Colorless clear liquid without suspended impurities |
| GC Purity | Pharma Grade ≥99.9%; Industrial Grade ≥99.5% |
| Water Content (KF) | ≤0.10% (pharma grade) |
| Chroma (APHA) | ≤10 |
| Residue on Ignition | ≤0.005% |
| Heavy Metals (Pb) | ≤10 ppm (pharma grade) |
| Packaging | 1L/5L amber plastic bottle, 25kg PE plastic drum, 200kg galvanized steel drum, 1000L IBC tote tank |
| Storage Condition | Hermetically sealed cool dry warehouse below 25 ℃, fully moisture-proof, isolate oxidizing substances |
| Transportation Requirement | Strongly hygroscopic polar organic liquid, sealed anti-absorption packaging |
| Shelf Life | 24 months under nitrogen sealed storage |
Safety Warning
Low-toxic penetrative liquid solvent. Liquid quickly penetrates skin; dust/vapor irritates eyes and respiratory tract. Skin contact may cause garlic odor in breath, mild skin irritation. All operations carried out in ventilated fume hood with nitrile gloves and splash-proof goggles. Avoid mixing with strong oxidants to prevent exothermic reaction. Waste liquid diluted and neutralized before discharge; residual liquid treated as general organic hazardous waste by licensed institutions.
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