International Chemical Safety Cards 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 (Inhibited) EC #         608-010-00-2 October 27, 1995 Peer reviewed 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. Powder, alcohol-resistant foam, water spray, 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!  •INHALATION Headache. Weakness. Nausea. Vomiting. Diarrhoea Asphyxia. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.  •SKIN MAY BE ABSORBED! (Further see Inhalation). Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower. 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 (Further see Inhalation). Do not eat, drink, or smoke during work. Give a slurry of activated charcoal in water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING 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 let this chemical enter the environment. (Extra personal protection: P2 filter respirator for harmful particles). Fireproof. Separated from food and feedstuffs. Cool. Store only if stabilized. Do not transport with food and feedstuffs. Marine pollutant. 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 SEE IMPORTANT INFORMATION ON BACK 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.

International Chemical Safety Cards METHACRYLONITRILE ICSC: 0652 I M P O R T A N T D A T A 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 will polymerize violently 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; 2.7 mg/m3 (as TWA) (skin) (ACGIH 1994-1995). MAK not established. OSHA PEL: none NIOSH REL: TWA 1 ppm (3 mg/m3) skin NIOSH IDLH: No data 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 irritates the eyes and the respiratory tract. Exposure could cause cyanide poisoning. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. PHYSICAL PROPERTIES Boiling point: 90.3°C Melting point: -35.8°C Relative density (water = 1): 0.8 Solubility in water, g/100 ml 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 This substance may be hazardous to the environment; special attention should be given to water organisms. 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. Transport Emergency Card: TEC (R)-30G32 NFPA Code: H2; 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.