Formula: CH2CI2 | CAS: 75-09-2

Detecting dichloromethane: Dichloromethane is highly volatile and should be stored in a cool, dry area in tightly closed, labeled containers. This chemical needs to be kept away from metals, light and any source of heat or ignition.

Detecting dichloromethane within the industry sector

Dichloromethane is used in many industries. It is used in paint removing, degreasing and cleaning, and manufacturing Some examples of workers at risk of being exposed to methylene chloride include the following:

  • Bathtub refinishers exposed to glazing fumes
  • Workers who use paint stripping products
  • Factories workers involved in metal cleaning and degreasing
  • Employees who work in pharmaceutical manufacturing

To prevent worker fatalities when using methylene chloride paint stripping products, OSHA advises employers to:

  • Perform monitoring and air sampling to determine exposure to methylene chloride.
  • Establish and implement a respiratory protection program.
  • Provide adequate ventilation (bathroom fans or open windows are not considered adequate).
  • Provide and maintain effective engineering and work practice controls.
  • Provide and enforce the use of proper personal protective equipment.
  • Provide essential methylene chloride hazard training to workers.
    – Safety & Health Magazine

Health risks associated with dichloromethane

Dichloromethane evaporates easily producing high concentrations of vapour, particularly in confined spaces or where ventilation is inadequate.It has also been classified as a Category 3 carcinogen in the European Community. Under the Chemicals (Hazard Information and Packaging) (CHIP) Regulations it has the risk phrase R40 ‘Possible risk of irreversible effects’.

Note: Category 3 substances under the CHIP Regulations are those which give cause for concern, owing to possible carcinogenic effects, but in respect of which the information available is not adequate for making a satisfactory assessment.

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Gas Factsheet

Everything you need to know about detecting dichloromethane

Our Gas Factsheets which is available to download below provides you with key information on the exposure limits and the locations of where potentially harmful gases can occur. We also share information on gas detection monitoring techniques and equipment that can help you manage gas detection in the workplace, for worker and site safety.

detecting dichloromethane instrument gas factsheet

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Detecting Dichloromethane

Formula: CH2CI2 | CAS: 75-09-2

Synonyms: dichloromethane, R30, methylene chloride, Aerothene MM, methylene dichloride, Narkotil, R30, Solaesthin, Solmethine, DCM, methane dichloride, methylene bichloride, NCI-C50102, UN 1593, freon 30, hcc 30, khladon 30, solaesthin

Specification Value/Information
Formula CH2Cl2
CAS no. 75-09-2
Gas Response Factor, 11.7 eV 1
Gas Response Factor, 10.6 eV 70
Gas Response Factor, 10.0 eV ZR
ppm per mg/m⁻³, (20 °C, 1 bar) 0.283
Molecular Weight, g/mole 84.9
Melting point, °C '-97
Boiling point, °C 40
Flash point, °C '-4
Specification Value/Information
Upper Explosive Limit, % 66
Lower Explosive Limit, % 15.5
Density,⁻³ 1.325
Ionisation Energy, eV 11.32
EH40 TWA, ppm 100
EH40 TWA, mg.m⁻³ 350
EH40 STEL, ppm 300
EH40 STEL, mg.m⁻³ 1060
NIOSH IDLH, ppm 2500
OSHA TWA PEL, ppm 25

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