Dimethyl Sulfoxide (DMSO)

Dimethyl Sulfoxide (DMSO) is a polar, organic liquid solvent known for its high miscibility with water and its ability to penetrate biological membranes. Commonly used in pharmaceuticals, research, and chemical processes.

CAS No: 67-68-5

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Formula

C₂H₆OS

Main Uses

Pharma, Research

Appearance

Colorless Liquid, Odorless

Handling

Combustible – Use with Caution

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Safety Highlights

While DMSO is not highly flammable, it is combustible and poses unique health hazards due to its rapid skin absorption properties. Proper PPE, ventilation, and storage are essential. The safety guidelines below are based on the official Safety Data Sheet (SDS).

Flammable Liquid

Flash point at 87°C. Keep away from heat, sparks, and open flames.

Toxic on Contact

Can carry harmful substances through the skin. Always wear gloves and protective clothing.

Corrosive Agent

May cause headache, dizziness, or nausea with overexposure. Avoid inhalation and contact with eyes or skin.

Emergency Measures

In case of fire, use CO₂, dry chemical, or alcohol-resistant foam. Avoid using water jets.

Proper Storage

Store in a cool, dry, well-ventilated area. Keep containers tightly sealed and away from ignition sources.

Regulatory ID

CAS No: 67-68-5 | UN No: NA1993 (Bulk Only) | DOT Classification: Combustible Liquid

Environmental Care

Low environmental hazard in small quantities, but do not release into drains. Handle waste properly.

PPE Required

Gloves, goggles, and lab coat recommended. Use respirator if ventilation is inadequate.

Frequently Asked Questions

Find clear, reliable answers to common questions about Dimethyl Sulfoxide (DMSO), covering its applications, flammability, skin absorption risks, safe handling, and environmental considerations. This section supports informed, compliant use in research and industrial settings.

What is DMSO used for?

DMSO is widely used in pharmaceutical research, cell preservation, and as a solvent for both organic and inorganic chemicals.

Is DMSO flammable?

DMSO is not highly flammable but is classified as a combustible liquid. Keep it away from open flames and ignition sources.

Can DMSO be absorbed through the skin?

Yes. DMSO penetrates skin quickly and can carry other dissolved chemicals with it, which may increase health risks.

What should I do in case of accidental skin contact?

Wash the affected area with plenty of water for at least 15 minutes. Remove contaminated clothing and seek medical attention if symptoms appear.

Is DMSO environmentally hazardous?

Not significantly, but it should not be discharged into drains or surface water. Dispose of waste following local regulations.

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