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METHACRYLONITRILE ICSC: 0652
Date of Peer Review: October 2005

Methylacrylonitrile
2-Methyl-2-propenenitrile
2-Cyanopropene
Isopropenylnitrile
CAS # 126-98-7 C4H5N
RTECS # UD1400000 Molecular mass: 67.1
UN # 3079 (stabilised)
EC Index # 608-010-00-2
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.
Alcohol-resistant foam. Dry powder. 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. Unconsciousness.
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.
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 take to a doctor.
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. Administer oxygen by trained personnel. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Remove all ignition sources. Personal protection: chemical protection suit including self-contained breathing apparatus. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Do not transport with food and feedstuffs.
EU 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
EMERGENCY RESPONSE 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.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
METHACRYLONITRILE ICSC: 0652
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, blocking vents.

CHEMICAL DANGERS:
The substance may polymerize violently under the influence of acid(s), base(s), light, with fire or explosion hazard. The substance may polymerize due to heating with fire or explosion hazard. On combustion, forms toxic and corrosive fumes including cyanides and nitrogen oxides.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 1 ppm as TWA; (skin); (ACGIH 2005).
MAK not established.
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 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The vapour is irritating to the eyes and the respiratory tract. The substance may cause effects on the cellular respiration, resulting in convulsions and unconsciousness. Exposure may result in death.

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

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


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005