Exposure to Methylene Chloride (MC)
Many construction companies use products that contain the hazardous chemical, methylene chloride.
Exposure often happens when workers are stripping paint or other coatings, applying foam, painting with epoxy paint, cleaning equipment with solvents, and spraying adhesives.
Workers are more likely to be exposed to high levels of MC when working in small, enclosed spaces that are not well ventilated.
Exposure may occur through inhalation, by absorption through the skin, or through contact with the skin. OSHA considers methylene chloride to be a potential occupational carcinogen.
The following describes some engineering controls and work practices you may find helpful in reducing worker exposures to MC at your site.
- Keep MC vapors contained. Store and transport MC products only in approved safety containers.
- Instruct and train employees to be aware of hazards, personal hygiene, and how to use personal protective equipment.
- Instruct employees handling or using flammable liquids, gases, or toxic materials in the safe handling and use of these materials.
- Avoid breathing the air directly above areas covered with MC.
- Avoid direct skin contact with MC. Wear two pairs of gloves when using stripping solution. The inner glove should be made of polyethylene (PE)/ethylene vinyl alcohol (EVOH), PE, or laminate to prevent MC penetration. The outer glove should be made of nitrile or neoprene to protect against puncture or rips. Wear a face shield or goggles to protect your face and eyes.
- Use the washing facilities in your work area to wash off any MC from your hands and face. Use lots of soap or mild detergent and water to clean grease, oil, dirt, or anything else off your skin. Do not use MC or other organic solvents to clean your skin.
- Minimize the chance of spills and leaks. Develop and follow procedures for containing MC spills or leaks.
- Take extra precautions in low and confined spaces. MC vapors are heavier than air, so they tend to move to low, unventilated spaces.
Check out more detailed information on Methylene Chloride from the EPA.
Knowledge Check Choose the best answer for the question.
3-4. Exposure to _____ often happens when workers are stripping paint or other coatings, applying foam, and painting with epoxy paint.
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