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NIOSH

METHACRYLONITRILE

ICSC: 0652

Methylacrylonitrile
2-Methyl-2-propenenitrile
2-Cyanopropene
Isopropenylnitrile
C4H5N
Molecular mass: 67.1
ICSC # 0652 		CAS # 126-98-7
RTECS # UD1400000
UN # 3079 (stabilised)
EC # 608-010-00-2
October 18, 2005 Validated

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

STORAGE

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.
Store only if stabilized. Fireproof. Cool. Keep in the dark. Separated from food and feedstuffs .
Do not transport with food and feedstuffs.
Note: D
F symbol
T symbol
R: 11-23/24/25-43
S: 1/2-9-16-18-29-45
UN Hazard Class: 3
UN Subsidiary Risks: 6.1
UN Packing Group: I
ICSC: 0652 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

METHACRYLONITRILE

ICSC: 0652

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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 cyanidesandnitrogen oxides.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 1 ppm as TWA; (skin); (ACGIH 2005).
MAK not established.
OSHA PEL†: none
NIOSH REL: TWA 1 ppm (3 mg/m3) skin
NIOSH IDLH: N.D. See: IDLH INDEX


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 the respiratory tract . The substance may cause effects on the cellular respiration , resulting in convulsions and unconsciousness . Exposure may result in death.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

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

ENVIRONMENTAL
DATA


N O T E S

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.
Transport Emergency Card: TEC (R)-30GTF1-I

NFPA Code: H4; F3; R2

ADDITIONAL INFORMATION



ICSC: 0652 METHACRYLONITRILE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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