Chemical Sampling Information
	Methylene chloride
Quick Links General Description Exposure Limits Health Factors Monitoring Search    [use word(s)/phrase] Table of Contents By Name A B C D E F G H I J K L M N O P Q R S T U V W X Y Z By CAS Number 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 [2008 Emergency Response Guidebook, 2.5 MB PDF]: 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; 12.5 ppm Action Level 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 - NIOSH Potential Occupational Carcinogens 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: 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 Analytical Methods (OSHA 80) method classification: Fully Validated 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 Analytical Methods (OSHA 59) method classification: Fully Validated All Trademarks are the property of their respective owners. Accessibility Assistance: Contact the OSHA Directorate of Technical Support and Emergency Management at 202-693-2300 for assistance accessing PDF materials.