Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

First-aid measures

Health Hazards:

The substance is irritating to the eyes, the skin and the respiratory tract. Exposure could cause lowering of consciousness. Exposure could cause the formation of methaemoglobin.

Skin and Eyes:

If dichloromethane is splashed on the skin, contaminated clothing shall be promptly removed and the skin washed with soap and water.

If liquid dichloromethane contacts the eyes, they shall be thoroughly irrigated with clean water. Medical assisstance shall be promptly provided in cases of eye splashes.


If a person breathes in large amounts of dichloromethane, move the exposed person to fresh air at once. Keep the affected person warm and at rest. Get medical attention immediately.

Fire-fighting measures

Fire Hazards:

Combustible under specific conditions. Gives off irritating or toxic fumes (or gases) in a fire.


In case of fire in the surroundings: use appropriate extinguishing media.

In case of fire: keep drums, etc., cool by spraying with water.

Accidental release measures


Do NOT let this chemical enter the environment.

Collect leaking and spilled liquid in sealable containers as far as possible.

Absorb remaining liquid in sand or inert absorbent and remove to safe place.

Handling and storage


Storage containers, piping, and valves shall be periodically checked for leakage.

Storage facilities shall be designed to contain spills; prevent contamination of workroom air.

Confined spaces:

Tanks, pits, tank cars, process vessels, tunnels, sewets, or other confined spaces which contain dichloromethane shall be thoroughly ventilated, tested for dichloromethane, oxygen, carbon monoxide, flammable gases, and other suspected noxious gases and inspected before entry.

Confined spaces shall be ventilated to keep dichloromethane concentration below the standard and to prevent oxigen deficiency.

Transport information

Land transport (UN RTDG/ADR/RID)

UN number:
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Proper shipping name and description:
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Marine transport (UN RTDG/IMDG)

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Exposure controls / personal protection

Engineering controls and work practices:

Should be sufficient to reduce exposures below the workplace standards for dichloromethane established by the national regulations to the lowest level achievable.

Engineering controls designed to limit exposure to dichloromethane may include:

—       Ventilation systems designed to prevent the accumulation or recirculation of dichloromethane in the workroom and to effectively remove dichloromethane from the breathing zones of workers. Ventilation systems shall be subjected to regular preventive maintenance and cleaning to ensure maximum effectiveness.

—       Portable exhaust ventilation or suitable general ventilation shall be provided for operations that require the application of liquid methylene chloride.

Personal Protective Equipment:

Respiratory Protection:

Respiratory protection should be used in accordance with company and applicable national regulatory requirements.

Respiratory protection should be used to supplement the engineering controls and work practices.

Persons should not be assigned to tasks requiring the use of respirators unless it has been determined they are physically able to perform the work and are trained to use the equipment.

Protective clothing:

For operations where the worker may come into direct contact with liquid dichloromethane, protective clothing (chemical impervious and resistant) shall be worn. Gloves, boots, overshoes, and bib-type aprones (at least knee length) shall be provided when necessary.

All protective clothing shall be well aired and inspected for physical defects before reuse.

Eye protection:

In work operations where dichloromethane (liquid or spray) may enter the eye, eye protection shall be provided. Chemical type goggles, safety glasses with splash shields, or plastic face shields made completely of dichloromethane-resistant materials shall be used.

Suitable protective clothing and eye protection should be in accordance with national, or regional standards and regulations.

Stability and reactivity


On contact with hot surfaces or flames this substance decomposes forming toxic and corrosive fumes.

Reacts violently with metals such as aluminium powder and magnesium powder, strong bases and strong oxidants causing fire and explosion hazard.

Attacks some forms of plastic rubber and coatings.

Disposal considerations

This substance, when discarded or disposed of, is a hazardous waste. The transportation, storage, treatment, and disposal of this waste material must be conducted in compliance with local regulations for hazardous wastes.

Disposal can occur only in properly permitted facilities. Check state and local regulation of any additional requirements for disposal conditions.