Dichlorodimethyl ether, symmetrical
- bis(Chloromethyl) ether
- Sym-dichloromethyl ether
- 1,1'-Dichlorodimethyl ether
- Chloromethyl ether
A colorless volatile liquid with a chloroform-like odor.
As lab reagent, intermediate for ion-exchange resins.
Registry Numbers and Inventories.
EC Index Number
Flammable; Carcinogenic Category 1; Very toxic; Toxic; Harmful
Tumorigen; Mutagen; Human Data
Swiss Giftliste 1
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
29 (25 C)
Vapor density (air=1)
1.328 g/cm3 (15 C)
Solubility in water
0.98 cp (25 C)
33.05 g/s2 (25 C)
1.4427 (20 C)
Partition coefficient, pKow
Heat of vaporization
Hazards and Protection.
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Unstable in moist air bis(chloromethyl) ether hydrolyzes very rapidly (half-life 10 to 40 seconds) on contact with water.
Incompatible with the following: Acids, water Reacts with water to form hydrochloric acid & formaldehyde.].
Decomposed by water to hydrochloric acid and formaldehyde when heated to decomposition bis(chloromethyl) ether emits very toxic hydrogen chloride fumes.
Upper exp. limit, %
Lower exp. limit, %
Move container from fire area if you can do so without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material.Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog, or foam.
Common ethers such as ethyl and methyl are particularly dangerous fire hazards. The common ones are easily ignited and have low flash points.
Container may explode in heat of fire. When heated to decomposition, it emits very toxic fumes of chlorides. Decomposed by water to hydrochloric acid and formaldehyde. Avoid water: hydrolyzes very rapidly (half life 10-40 seconds) on contact with water. Avoid decomposing heat, powerful oxidizers, areas of high fire hazard and moist air.
Fire may produce irritating, corrosive and/or toxic gases.
TLV (as as TWA): 0.001 ppm; 0.0047 mg/m3 A1: confirmed Human Carcinogen (ACGIH 1992-1993). OSHA PEL: 1910.1008 See Appendix B NIOSH REL: Ca See Appendix A NIOSH IDLH: Potential occupational carcinogen
O, G-A1, I-1, N-1, CP65
Abdominal cramps, sore throat and vomiting. See inhalation.
Chronic bronchitis with chronic productive cough and dyspnea have been seen with chronic inhalation exposure.
Redness and burning sensation.
Redness, pain and blurred vision.
Seek medical assistance.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.
USCG CHRIS Code
Std. Transport #