occupational exposure to methylene chloride l.
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Occupational Exposure to Methylene Chloride. 29 CFR 1910.1052 29 CFR 1915.1052 29 CFR 1926.1152. Chemical Description. Chlorinated aliphatic hydrocarbon, chemical formula - CH 2 CL 2 Fat soluble Non-flammable Volatile compound Metabolized to formaldehyde and carbon monoxide.

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occupational exposure to methylene chloride

Occupational Exposure to Methylene Chloride

29 CFR 1910.1052

29 CFR 1915.1052

29 CFR 1926.1152

chemical description
Chemical Description
  • Chlorinated aliphatic hydrocarbon, chemical formula - CH2CL2
  • Fat soluble
  • Non-flammable
  • Volatile compound
  • Metabolized to formaldehyde and carbon monoxide


methylene chloride
  • Colorless liquid with a mild sweet odor.
  • A solvent which is used in many different types of work activities, such as paint stripping, foam manufacturing, cleaning and degreasing.
  • Employees exposed to it are at increased risk of developing cancer, effects on the heart, central nervous system, and liver, skin or eye irritation.
  • Exposure may occur through inhalation, absorbed through the skin or through contact with the skin.
  • Used in paint & varnish remover, in aerosols, in metal cleaning, and extractions of fats and oils from food products.
uses of methylene chloride
Uses of Methylene Chloride
  • Blowing agent in foam manufacturing
  • Solvent in aerosol products
  • Solvent in manufacturing
  • Cleaning and degreasing solvent
  • Component of paint strippers


health effects
Health Effects
  • Causes headaches, decreased attention span, disorientation and loss of consciousness after high exposures
  • Metabolizes to carbon monoxide which increases the risk of heart attack
  • Causes irritation to eyes and skin and skin burns after prolonged exposure
  • Laboratory studies indicate chronic exposure causes cancer


material safety data sheets msdss
Material safety data sheets (MSDSs)
  • Labels on containers
  • Manufacturing/importing MDA
  • Hazard communication program
  • Location of MSDSs
potential health hazards
Immediate (acute) health effects



Loss of appetite





Dark urine

Potential health hazards
potential health hazards8
Potential health hazards
  • Long-term (chronic effects)
  • Carcinogenic
  • Mutagenic
  • Liver, kidney, blood, or spleen problems
first aid measures

Eye contact: Flush eyes w/plenty of water for at least 15 minutes

Skin contact: wash skin w/plenty of water, remove contaminated clothing & shoes.

Serious skin contact: Wash w/disinfectant soap & cover skin w/anti bacterial cream

Inhalation: remove to fresh air, if breathing is difficult give oxygen

first aid measures ii

Ingestion: Do NOT induce vomiting unless directed by medical personnel to do so. Never give anything by mouth to an unconscious person. If large quantities of this material are swallowed, call a physician immediately.

accidental release measures

SMALL SPILL: Dilute w/water & mop up, or absorb with an inert dry material & place in appropriate waste disposal container.

LARGE SPILL: Absorb w/an inert material & put waste in appropriate waste disposal.

handling and storage
  • Keep locked up
  • Keep away from heat
  • Keep away from sources of ignition
  • Empty containers pose a fire risk
  • Do not ingest
  • Do not breathe gas/fumes/vapor/spray
  • Operate in sufficient ventilation
personal protective equipment
Personal protective equipment
  • Purpose
  • Proper use
  • Limitations
  • Splash Goggles, Lab Coat, Respirator & Gloves.
a scope and application
(a) Scope and Application

Applies to all occupational exposure to methylene chloride in general industry, construction, and shipyard employment.


b definitions
(b) Definitions

“Emergency” means any occurrence such as, but not limited to, equipment failure, rupture of containers, or failure of control equipment, which results, or is likely to result in uncontrolled release of MC

“Symptom” means central nervous system effects such as headaches, disorientation, dizziness, fatigue, and decreased attention span; skin effects such as chapping, erythema, cracked skin or burns; and cardiac effects such as chest pains or shortness of breath


e regulated areas
(e) Regulated Areas
  • Whenever exposures exceed or can reasonably be expected to exceed either 8-hour TWA PEL or STEL
  • Access limited to authorized persons
  • Respirators must be supplied to persons entering area
  • Demarcation of area
  • Communication with other employers


f methods of compliance
(f) Methods of Compliance
  • Engineering and work practices controls
  • Respirators as supplemental protection
  • Employee rotation as a method of compliance prohibited
  • Leak and spill detection procedures required


h protective work clothing and equipment
(h) Protective Work Clothing and Equipment
  • Must be worn to prevent skin or eye irritation
  • Must be cleaned, laundered, repaired, replaced, disposed of and provided at no cost to employee
  • Eye and face protection must meet requirements of 29 CFR 1910.133 or 1915.153


i hygiene facilities
(i) Hygiene Facilities
  • Washing facilities provided when employees have potential skin contact with 0.1% or more MC solutions
  • Eyewash facilities provided for emergency use when employees have potential eye contact with 0.1% or more MC solutions


k hazard communication
(k) Hazard Communication
  • The following hazards associated with MC must be communicated on labels and MSDSs in accordance with 29 CFR 1910.1200, 29 CFR 1915.1200, and 29 CFR 1926.59:
    • Cancer
    • Cardiac effects
    • Central nervous system effects
    • Liver effects
    • Skin and eye irritation


l employee information and training
(l) Employee Information and Training
  • Provided to employees prior to or on initial job assignment and should include the following:
    • Information required under the Hazard Communication Standard
    • Requirements in the standard and appendices
    • Quantity, location, manner of use, release, and storage of MC and the specific nature of operations that result in MC exposure