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3-CHLORO-2-METHYL-1-PROPENEICSC: 1341
Methallyl chloride
Methyl allyl chloride
gamma-Chloroisobutylene
November 2008
CAS #: 563-47-3
UN #: 2554
EC Number: 209-251-2

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable. Heating will cause rise in pressure with risk of bursting. Gives off irritating or toxic fumes (or gases) in a fire.  Vapour/air mixtures are explosive. Heating will cause rise in pressure with risk of bursting.  NO open flames, NO sparks and NO smoking. NO contact with hot surfaces.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  Use powder, carbon dioxide, foam.  In case of fire: keep drums, etc., cool by spraying with water. 

 PREVENT GENERATION OF MISTS! AVOID ALL CONTACT!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Headache. Shortness of breath.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Watering of the eyes. Redness. Pain.  Wear safety goggles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Rest. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Remove all ignition sources. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. 

According to UN GHS Criteria

flam;flameexcl mark;warncancer;health haz
DANGER
Highly flammable liquid and vapour
Harmful if swallowed
May be harmful if inhaled
Causes skin and eye irritation
May cause damage to the nervous system if inhaled
May cause allergic skin reaction
Harmful to aquatic life 

Transportation
UN Classification
UN Hazard Class: 3; UN Pack Group: II 

STORAGE
Fireproof. Separated from strong oxidants and strong bases. Cooled. Well closed. Ventilation along the floor. Store in an area without drain or sewer access. 
PACKAGING
 
3-CHLORO-2-METHYL-1-PROPENE ICSC: 1341
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-YELLOW LIQUID WITH PUNGENT ODOUR. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes on burning. This produces toxic fumes including phosgene and hydrogen chloride. Reacts with strong bases and strong oxidants. This generates fire hazard. 

Formula: C4H7Cl / ClCH2(CH3)C=CH2
Molecular mass: 90.55
Boiling point: 72°C
Melting point: -80°C
Relative density (water = 1): 0.92
Solubility in water, g/100ml at 25°C: 0.14 (very poor)
Vapour pressure, kPa at 20°C: 14
Relative vapour density (air = 1): 3.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.3
Flash point: -12°C c.c.
Auto-ignition temperature: 540°C
Explosive limits, vol% in air: 2.2-10.4
Octanol/water partition coefficient as log Pow: 1.98  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour and by ingestion. 

Effects of short-term exposure
Lachrymation. The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the central nervous system. Exposure at high levels could cause lowering of consciousness. 

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

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. 


OCCUPATIONAL EXPOSURE LIMITS
MAK: carcinogen category: 3B 

ENVIRONMENT
The substance is harmful to aquatic organisms. 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F, C, N; R: 11-20/22-34-43-51/53; S: (2)-9-16-26-29-36/37/39-45-61 

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       Toxicological Abbreviations