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METHACRYLONITRILE
ICSC: 0652
Peer-Review Status: 18.10.2005 Validated
Methylacrylonitrile
2-Methyl-2-propenenitrile
2-Cyanopropene
Isopropenylnitrile 
CAS #: 126-98-7 RTECS #: UD1400000
UN #: 3079 (stabilised)
EC #: 608-010-00-2
EINECS #: 204-817-5
    Formula: C4H5N
Molecular mass: 67.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking.  Use alcohol-resistant foam. Use dry powder. Use carbon dioxide. 
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   STRICT HYGIENE!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Headache. Confusion. Weakness. Shortness of breath. Convulsions. Unconciousness.  Use local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED! Further see Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes Redness. Pain.  Wear 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 refer for medical attention. 
Ingestion See Inhalation.  Do not eat, drink, or smoke during work.  Give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Wear protective gloves when inducing vomiting. NO mouth-to-mouth artificial respiration. Administration of oxygen may be needed. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Remove all ignition sources. Evacuate danger area! Personal protection: chemical protection suit including self-contained breathing apparatus. 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 transport with food and feedstuffs. 
EC Classification
Symbol: F, T; R: 11-23/24/25-43; S: (1/2)-9-16-18-29-45; Note: D 
UN Classification
UN Hazard Class: 3; UN Subsidiary Risks: 6.1; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30GTF1-I.
NFPA Code: H4; F3; R2. 
Store only if stabilized. Fireproof. Cool. Keep in the dark. Separated from food and feedstuffs. 

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. Vapours are uninhibited and may polymerize, causing blockage of vents. 

Chemical dangers
The substance may violently polymerize under the influence of acids, bases and light. This generates fire or explosion hazard. The substance may polymerize due to heating. This generates fire or explosion hazard. On combustion, forms toxic and corrosive fumes including cyanides and nitrogen oxides. 

Occupational exposure limits
TLV: 1ppm as TWA; (skin); (ACGIH 2005). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour, through the skin 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
The vapour is irritating to the eyes and respiratory tract. The substance may cause effects on the cellular respiration. This may result in convulsions and unconsciousness. Exposure could cause death. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 90.3°C
Melting point: -35.8°C
Relative density (water = 1): 0.8
Solubility in water at 20°C: moderate
Vapour pressure, kPa at 25°C: 8.66
Relative vapour density (air = 1): 2.3
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.17
Flash point: 1.1°C c.c.
Explosive limits, vol% in air: 2-6.8
Octanol/water partition coefficient as log Pow: 0.68  
 

NOTES
The commercial product contains 50 ppm hydroquinone monoethyl ether as a stabilizer.
The odour warning when the exposure limit value is exceeded is insufficient.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Use same antidotes as in the case of cyanide poisoning. 

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