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CHLOROMETHYL METHYL ETHER ICSC: 0238
Date of Peer Review: September 1993

Dimethylchloro ether
Chloromethoxymethane
CAS # 107-30-2 CH3OCH2CI
RTECS # KN6650000 Molecular mass: 80.5
UN # 1239
EC Index # 603-075-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Powder, alcohol-resistant foam, water in large amounts, carbon dioxide. Water may be ineffective.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT GENERATION OF MISTS! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Burning sensation. Cough. Dizziness. Headache. Laboured breathing. Nausea. Sore throat.
Closed system and ventilation.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Skin burns. Pain. Blisters.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Redness. Pain. Blurred vision. Loss of vision. Severe deep burns.
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal cramps. Vomiting. (Further see Inhalation).
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. Personal protection: complete protective clothing including self-contained breathing apparatus.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
EU Classification
Symbol: F, T
R: 45-11-20/21/22
S: 53-45
UN Classification
UN Hazard Class: 6.1
UN Subsidiary Risks: 3
UN Pack Group: I
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GTF1-I
Fireproof. Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
CHLOROMETHYL METHYL ETHER ICSC: 0238
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID, WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
On combustion, forms toxic gases and vapours (phosgene - see ICSC 0007 and hydrogen chloride - see ICSC 0163). The substance decomposes on contact with water producing hydrogen chloride and formaldehyde (see ICSC 0275). Attacks many metals in presence of water.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: A2 (suspected human carcinogen); (ACGIH 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour.

INHALATION RISK:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Inhalation of the substance may cause lung oedema (see Notes).

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Lungs may be affected by repeated or prolonged exposure. This substance is carcinogenic to humans.
PHYSICAL PROPERTIES
Boiling point: 59C
Melting point: -104C
Relative density (water = 1): 1.06
Solubility in water: decomposes
Vapour pressure, kPa at 20C: about 25.3
Relative vapour density (air = 1): 2.8
Relative density of the vapour/air-mixture at 20C (air = 1): about 1.4
Flash point: -17.8C
Auto-ignition temperature: see Notes
Explosive limits, vol% in air: see Notes
ENVIRONMENTAL DATA

NOTES
The auto-ignition temperature is unknown in literature. Explosive limits are unknown in literature. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Do NOT use in the vicinity of a fire or a hot surface, or during welding. Check for peroxides prior to distillation; eliminate if found. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005