Dimethyl sulfoxide (DMSO), with the chemical formula C2H6OS, is a versatile organic solvent that plays a vital role in many industries, including pharmaceuticals, chemical synthesis, and agriculture.
CAS 67-68-5 DMSO Dimethyl Sulfoxide:
Purity, %(wt)：≥99%
Appearance: Clear colorless liquid
Density: 1.1 g/mL
Boiling point：189℃
Water Solubility: Miscible
Acidity coefficient: 35(at 25℃) pKa
DMSO Formula and Structure:
Dimethyl sulfoxide (DMSO) is an organosulfur compound with the molecular formula C2H6OS (or (CH3)2SO). It is a colorless, polar, aprotic liquid with a trigonal pyramidal structure in which the central sulfur atom is bonded to two methyl groups, one oxygen atom, and a lone pair of electrons.
- The structural formula of dimethyl sulfoxide is shown below:
DMSO (CAS No.67-68-5) Properties:
| Common Name | Dimethyl Sulfoxide (DMSO) |
| CAS Number | 67-68-5 |
| Molecular Formula | C₂H₆OS / (CH₃)₂SO |
| Molar Mass | 78.13 g/mol |
| Density | 1.1 g/cm³ |
| Form | Liquid |
| Color | Colourless |
| Odour | Characteristic (mild, faint odor) |
| Polarity Type | Aprotic, highly polar |
| Key Properties | Hygroscopic, flammable, high boiling point, good thermal stability, miscible with water and most organic solvents |
| HS Code | 29309070 |
| EC Number | 200-664-3 |
| Storage Temperature | +15 to +25 °C (room temperature) |
| SDS Availability | Available |
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DMSO Solvent Uses
Dimethyl Sulfoxide is a versatile polar aprotic solvent widely used across pharmaceutical, chemical, biotechnology, electronics, and industrial manufacturing environments.
1. CAS 67-68-5 DMSO is widely used as a pharmaceutical solvent in formulation development, excipient systems, and drug delivery research.
2. It is commonly applied as an industrial solvent for polymer dissolution, resin processing, and chemical manufacturing operations.
3. High-purity grade dimethyl sulfoxide is used for electronics cleaning in semiconductor fabrication, photoresist stripping, and PCB processing.
4. In organic chemistry, DMSO is frequently used as a reaction solvent for oxidation, substitution, and coupling reactions.
5. It is also used as an extraction solvent in separation and purification processes for pharmaceutical intermediates and natural products.
6. In biotechnology, DMSO is used as a cryoprotectant and formulation excipient for cell, tissue, and microbial preservation.
Frequently Asked Questions
DMSO is a laboratory and industrial solvent for many gases, synthetic fibers, paint, hydrocarbons, salts, and natural products. Because it is aprotic, relatively inert, nontoxic, and stable at high temperatures, it is a frequently used solvent for chemical reactions.
DMSO (dimethyl sulfoxide) is widely described as having a strong, distinct odor of garlic or sulfur.
Yes, Acetonitrile (ACN) is fully miscible with water at any ratio under normal ambient conditions.
Dimethyl sulfoxide is anti-inflammatory and may be applied topically to reduce pain and swelling. More. , or dimethyl sulfoxide, has a long history as a topical anti-inflammatory agent.
- Keep in a cool, dry, well-ventilated place
- Store in tightly sealed containers to prevent moisture absorption
- Avoid heat, flames, and strong oxidizing agents
- Use compatible containers (glass or stainless steel preferred)
- Keep away from direct sunlight
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