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METHACRYLONITRILEICSC: 0652
October 2005
CAS #: 126-98-7Methylacrylonitrile
2-Methyl-2-propenenitrile
2-Cyanopropene
Isopropenylnitrile
UN #: 3079 (stabilised)
EINECS #: 204-817-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  Vapour/air mixtures are explosive.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting.  Use alcohol-resistant foam. Use dry powder. Use carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

 STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Headache. Confusion. Weakness. Shortness of breath. Convulsions. Unconsciousness.  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 CLASSIFICATION & 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. 

According to UN GHS Criteria

 

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

STORAGE
Store only if stabilized. Fireproof. Cool. Keep in the dark. Separated from food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs. 
METHACRYLONITRILE ICSC: 0652
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. 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. 

Formula: C4H5N
Molecular mass: 67.1
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  


EXPOSURE & HEALTH EFFECTS

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

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. 

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
 


Occupational exposure limits
TLV: 1 ppm as TWA; (skin); A4 (not classifiable as a human carcinogen) 

ENVIRONMENT
 

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
  EC Classification
Symbol: F, T; R: 11-23/24/25-43; S: (1/2)-9-16-18-29-45; Note: D 

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       Toxicological Abbreviations