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Chloromethyl methyl ether

General Description

  • Synonyms: CMME; Chloro Methyl Methyl Ether; Methyl Chloromethyl Ether prior to 9/1/89
  • OSHA IMIS Code Number: 2640
  • Chemical Abstracts Service (CAS) Registry Number: 107-30-2
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: KN6650000; 34922
  • Department of Transportation Regulation Number (49 CFR 172.101) and Emergency Response Guidebook: UN1239 Poison Flammable Liquid
  • Chemical Description and Physical Properties:
    • Clear, colorless liquid
  • Incompatibilities: Water, unstable

Exposure Limits

  • OSHA Permissible Exposure Limit (PEL):
  • American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): Appendix A2 (Suspected Human Carcinogen)
  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Potential Carcinogen; 29 CFR 1910.1006

Health Factors

  • Carcinogenic Classification:
    • International Agency for Research on Cancer (IARC): Group 1, carcinogenic to humans (Technical-Grade)
    • National Toxicology Program (NTP): Human Carcinogen
  • Potential Symptoms: Eye, skin, mucous membrane irritation; pulmonary edema, pulmonary congestion, pneumonia; burns, necrosis; coughing, wheezing; blood stained sputum; weight loss; bronchial secretions; (carcinogenic)
  • Health Effects: Cancer-Lung (HE1)
  • Affected Organs: Respiratory system, skin, eyes, mucous membranes

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • Two Midget Impingers in series, each containing 10 mL derivatizing reagent
  • maximum volume: 50 Liters
  • maximum flow rate: 0.5 L/min
  • current analytical method: Gas Chromatography; GC/ECD
  • method reference: 2 (OSHA 10)
  • method classification: Fully Validated
  • note: Derivatizing reagent: 16 grams of 2,4,6-Trichlorophenol and 4.4 grams of Sodium methoxide dissolved in 1 Liter of Methanol. OSHA personnel may obtain sampling solution from the Salt Lake Technical Center (SLTC).

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