International Chemical Safety Cards 4-VINYL TOLUENE ICSC: 0735 p-Methyl styrene 1-Ethenyl-4-methylbenzene p-Vinyl toluene CH3C6H4CH=CH2 / C9H10 Molecular mass: 118.2 ICSC #    0735 CAS #     622-97-9 RTECS # WL5076000 UN #        2618 April 07, 1997 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Flammable. Heating will cause rise in pressure with risk of bursting. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION Above 52.8°C explosive vapour/air mixtures may be formed. Above 52.8°C use a closed system, ventilation, and explosion-proof electrical equipment. In case of fire: keep cylinder cool by spraying with water. EXPOSURE PREVENT GENERATION OF MISTS!  •INHALATION Dizziness. Drowsiness. Dullness. Headache. Sore throat. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.  •SKIN Dry skin. Redness. Protective gloves. Rinse and then wash skin with water and soap.  •EYES Redness. Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Ventilation. 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. (Extra personal protection: self-contained breathing apparatus). Separated from strong oxidants, strong acids. Well closed. Keep in a well-ventilated room. Store only if stabilized. Marine pollutant. R: S: UN Hazard Class: 3 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 0735 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 4-VINYL TOLUENE ICSC: 0735 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. CHEMICAL DANGERS: The substance may polymerize due to warming with fire or explosion hazard. Reacts with strong oxidants and strong acids. OCCUPATIONAL EXPOSURE LIMITS: TLV: 50 ppm; 242 mg/m3 (as TWA); 100 ppm; 483 mg/m3 (as STEL) (ACGIH 1996). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. INHALATION RISK: A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. The liquid defats the skin. The substance may have effects on the liver and kidneyskidneys , resulting in tissue lesions . PHYSICAL PROPERTIES Boiling point: 173°C Melting point: -34°C Relative density (water = 1): 0.897 Solubility in water: none Vapour pressure, kPa at 20°C: <0.1 Relative vapour density (air = 1): 4.1 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00 Flash point: 52.8°C Auto-ignition temperature: 515°C Explosive limits, vol% in air: 1.1-5.3 Octanol/water partition coefficient as log Pow: 3.580 ENVIRONMENTAL DATA N O T E S Also consult ICSC #0514 Vinyl toluene isomer mixture. NFPA Code: H2; F2; R2; ADDITIONAL INFORMATION ICSC: 0735 4-VINYL TOLUENE (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.