NIOSH Pocket Guide to Chemical Hazards

Chloromethyl methyl ether

CAS 107-30-2


RTECS KN6650000
Synonyms & Trade Names
Chlorodimethyl ether, Chloromethoxymethane, CMME, Dimethylchloroether, Methylchloromethyl ether
DOT ID & Guide
1239 131


NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1006] See Appendix B
IDLH Ca [N.D.] See: IDLH INDEX 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 73F and BP at or above 100F.
Incompatibilities & Reactivities
Water [Note: Reacts with water to form hydrochloric acid & formaldehyde.]
Measurement Methods
NIOSH P&CAM220 (II-1); OSHA 10
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
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
Important additional information about respirator selection
Respirator Recommendations (See Appendix E) 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
(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   See ICSC CARD: 0238   See MEDICAL TESTS: 0048