Dimethyl sulfoxide

Physical and chemical properties

Color and smell state: colorless and slightly bitter transparent liquid

Toxicity: less toxic

Flammability: combustible

Density: 1.100g/mL

Volatility: non-volatile

Corrosion: Corrosive to iron and copper when containing water, but not to aluminum

Boiling point: 189°C

Decomposability: high temperature decomposition

Stability: good thermal stability

Melting point: 18.4 °C

Acidity and alkalinity: weakly alkaline

Moisture absorption: very easy to absorb moisture

Spontaneous ignition point: 300~302℃

Viscosity: sticky

Flash point: 95


Solubility: soluble in water and most organic solvents


CAS: 67-68-5

HS: 29303000.90 EINECS: 200-664-3


Dimethyl sulfoxide is widely used as a solvent and reaction reagent, can be used as a reaction medium and organic synthesis intermediates, pesticide additives, and antifreeze.

Hazard category

General chemicals

Fire-fighting measures

Firefighters must wear gas masks and put out the fire in the upwind direction from a safe distance. Move the container from the fire scene to an open place as much as possible. Keep the fire container cool by spraying water until the fire is over. If the container in the fire scene has changed color or produces sound from the safety relief device, it must be evacuated immediately. Extinguishing agent: water mist, foam, dry powder, carbon dioxide, sandy soil.

Emergency treatment

Skin contact: Take off contaminated clothing and rinse with plenty of running water

Eye contact: Lift the eyelid, rinse with running water or normal saline, and seek medical attention

Inhalation: Leave the scene to fresh air. If breathing is difficult, give oxygen and seek medical attention

Ingestion: Drink enough warm water, induce vomiting, seek medical attention

Packaging, storage, transportation

The product is packaged in aluminum bucket, plastic bucket or glass bottle, 225kg/drum. This product should be sealed in a cool, dry place and protected from light.

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