# NIOSH Pocket Guide to Chemical Hazards
Chloromethyl methyl ether | CAS 107-30-2
CH3OCH2Cl | RTECS KN6650000
Synonyms & Trade Names Chlorodimethyl ether, Chloromethoxymethane, CMME, Dimethylchloroether, Methylchloromethyl ether | DOT ID & Guide 1239 131
Exposure Limits | NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1006] See Appendix B
IDLH Ca [N.D.] | Conversion
Physical Description Colorless liquid with an irritating odor.
MW: 80.5 | BP: 138°F | FRZ: -154°F | Sol: Reacts
VP(70°F): 192 mmHg | IP: 10.25 eV |  | Sp.Gr: 1.06
Fl.P(oc): 32°F | UEL: ? | LEL: ? |
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Water [Note: Reacts with water to form hydrochloric acid & formaldehyde.]
Measurement Methods NIOSH P&CAM220 (II-1); OSHA 10
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated/Daily Remove: When wet (flammable) Change: Daily Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, mucous membrane; pulmonary edema, pulmonary congestion, pneumonitis; skin burns, necrosis; cough, wheezing, pulmonary congestion; blood stained-sputum; weight loss; bronchial secretions; [potential occupational carcinogen]
Target Organs Eyes, skin, respiratory system Cancer Site [in animals: skin & lung cancer]
See also: INTRODUCTION