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Safety and Health Topics: |
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| Methylene Chloride |
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General Description
Synonyms: Methylene dichloride; Dichloromethane; Composite Constituent
OSHA IMIS Code Number: 1730
Chemical Abstracts Service (CAS) Registry Number: 75-09-2
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: PA8050000
Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1593 160
NIOSH Pocket Guide to Chemical Hazards, Methylene Chloride: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1052 -- 25 ppm TWA; 125 ppm STEL
OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.1152 requirements identical to 1910.1052
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1052 requirements identical to 1910.1052
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 50 ppm, 174 mg/m3 TWA; Appendix A3 (Confirmed Animal Carcinogen with Unknown Relevance to Humans); BEI
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Appendix A - Potential Occupational Carcinogen; Lowest Feasible Concentration
Health Factors
Potential symptoms: Fatigue, weakness, sleepiness, lightheadedness; numb limbs, tingling; nausea; eye, skin irritation; (carcinogenic)
Health Effects: Chemical anoxia (Metabolic conversion to CO) (HE17) Cumulative liver damage (HE3) CNS effects/Narcosis (HE8); Mutagen (HE2)
Affected organs: Skin, CVS, eyes, CNS
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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sampling media: Charcoal Tube (350/350/350 mg sections, 20/40 mesh)
analytical solvent: Carbon Disulfide
alternative solvent: (99:1) Carbon Disulfide/Dimethylformamide
maximum volume: 10 Liters maximum flow rate: 0.05 L/min (TWA)
minimum time: 5 Minutes maximum flow rate: 0.05 L/min (Ceiling or STEL)
minimum time: 5 Minutes maximum flow rate: 0.05 L/min (Peak)
current analytical method: Gas Chromatography; GC/FID
method reference: OSHA Manual of Analytical Methods (OSHA 59)
method classification: Fully Validated
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sampling media: Carbosieve S-III Tube (130/65 mg sections, 60/80 mesh)
analytical solvent: (99:1) Carbon Disulfide/Dimethylformamide
maximum volume: 3 Liters maximum flow rate: 0.05 L/min (TWA)
minimum time: 5 Minutes maximum flow rate: 0.05 L/min (Ceiling or STEL)
minimum time: 5 Minutes maximum flow rate: 0.05 L/min (Peak)
current analytical method: Gas Chromatography; GC/FID
method reference: OSHA Manual of Analytical Methods (OSHA 80)
method classification: Fully Validated
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| Revised: 21
September 2004 |
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