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3-CHLORO-2-METHYL-1-PROPENE
ICSC: 1341
Peer-Review Status: 14.11.2008 Validated
Methallyl chloride
Methyl allyl chloride
gamma-Chloroisobutylene 
CAS #: 563-47-3 RTECS #: UC8050000
UN #: 2554
EC #: 602-032-00-6
EINECS #: 209-251-2
    Formula: C4H7Cl / ClCH2(CH3)C=CH2
Molecular mass: 90.55

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Heating will cause rise in pressure with risk of bursting. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking. NO contact with hot surfaces.  Use powder, carbon dioxide, foam. 
EXPLOSION Vapour/air mixtures are explosive. Heating will cause rise in pressure with risk of bursting.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   PREVENT GENERATION OF MISTS! AVOID ALL CONTACT!   
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
PACKAGING & 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.   
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 
UN Classification
UN Hazard Class: 3; UN Pack Group: II 
GHS Classification
Signal: Danger
Highly flammable liquid and vapour
Harmful if swallowed
May be harmful if inhaled vapour
Causes skin irritation
Causes eye irritation
May cause damage to the nervous system if inhaled
May cause allergic skin reaction
Harmful to aquatic life 
flam;flameexcl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30GF1-I+II.
NFPA Code: H1; F3; R1. 
Fireproof. Separated from strong oxidants and strong bases. Cooled. Well closed. Ventilation along the floor. Store in an area without drain or sewer access. 

IMPORTANT DATA
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. 

Occupational exposure limits
TLV not established.
MAK: Carcinogen category: 3B; (DFG 2008). 

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

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

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. 

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


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
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  
The substance is harmful to aquatic organisms. 

NOTES
 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations