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CHLOROMETHYL METHYL ETHERICSC: 0238
November 2009
CAS #: 107-30-2Dimethylchloro ether
Chloromethoxymethane
UN #: 1239
EINECS #: 203-480-1

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. Heating will cause rise in pressure with risk of bursting.  Vapour/air mixtures are explosive.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding).  Use dry powder. Water may be ineffective.  In case of fire: keep drums, etc., cool by spraying with water. 

 AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Burning sensation. Cough. Sore throat. Dizziness. Headache. Nausea. Shortness of breath. Laboured breathing.  Use closed system and ventilation.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention. 
Skin Redness. Pain. Skin burns. 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 burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Burns in mouth and throat. Abdominal cramps. Vomiting. Diarrhoea. Shock or collapse.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Remove all ignition sources. Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer. 

According to UN GHS Criteria

flam;flamecorrcancer;health haz
DANGER
Highly flammable liquid and vapour
Causes severe skin burns and eye damage
May cause cancer 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Subsidiary Risks: 3; UN Pack Group: I 

STORAGE
Fireproof. Provision to contain effluent from fire extinguishing. Well closed. Separated from food and feedstuffs. Store in an area without drain or sewer access. 
PACKAGING
Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs. 
CHLOROMETHYL METHYL ETHER ICSC: 0238
PHYSICAL & CHEMICAL INFORMATION

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. As a result of flow, agitation, etc., electrostatic charges can be generated. 

Chemical dangers
On combustion, forms toxic gases including phosgene (see ICSC 0007) and hydrogen chloride (see ICSC 0163). Decomposes on contact with water. This produces hydrogen chloride and formaldehyde (see ICSC 0275). Attacks many metals in the presence of water. 

Formula: CH3OCH2CI/C2H5ClO
Molecular mass: 80.5
Boiling point: 59°C
Melting point: -104°C
Relative density (water = 1): 1.06
Solubility in water: decomposes
Vapour pressure, kPa at 20°C: 21.6
Relative vapour density (air = 1): 2.8
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.4
Flash point: -8°C c.c.
Auto-ignition temperature: see Notes
Explosive limits, vol% in air: see Notes 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
Serious local effects by all routes of exposure. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema, but only after initial corrosive effects on eyes and/or airways have become manifest. Medical observation is indicated. 

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
This substance is carcinogenic to humans. Repeated or prolonged inhalation may cause effects on the lungs. 


Occupational exposure limits
TLV: A2 (suspected human carcinogen).
MAK: carcinogen category: 1 

ENVIRONMENT
 

NOTES
The auto-ignition temperature is unknown in the literature.
Explosive limits are unknown in the literature.
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.
TLV Note: Exposure by all routes should be carefully controlled to levels as low as possible. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F, T; R: 45-11-20/21/22; S: 53-45; Note: E 

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    See Also:
       Toxicological Abbreviations
       Chloromethyl Methyl Ether (IARC Summary & Evaluation, Volume 4, 1974)