International Chemical Safety Cards STYRENE OXIDE ICSC: 1201 Phenylethylene oxide Phenyl oxirane Styrene epoxide Styryl oxide C8H8O / C6H5CHCH2 Molecular mass: 120.15 ICSC #    1201 CAS #     96-09-3 RTECS # CZ9625000 EC #         603-084-00-2 October 24, 1994 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. NO contact with acid(s) and base(s). Water spray, carbon dioxide. EXPLOSION Above 76°C explosive vapour/air mixtures may be formed. Above 76°C use a closed system, ventilation. In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water. EXPOSURE PREVENT GENERATION OF MISTS! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!  •INHALATION Dizziness. Drowsiness. Unconsciousness. Vomiting. Local exhaust or breathing protection. Fresh air, rest.  •SKIN MAY BE ABSORBED! Redness. Skin burns. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Redness. Pain. Severe deep burns. 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 Abdominal pain. Burning sensation. Diarrhoea. Nausea. Shock or collapse. (Further see Inhalation). Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT let this chemical enter the environment. (Extra personal protection: complete protective clothing including self-contained breathing apparatus). Separated from acids and bases. Cool. Dry. Keep in a well-ventilated room. Note: E T symbol R: 45-21-36 S: 53-45 SEE IMPORTANT INFORMATION ON BACK ICSC: 1201 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 STYRENE OXIDE ICSC: 1201 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO PALE YELLOW LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance may polymerize on heating above 200°C, under the influence of acid(s), base(s) or certain metal salts. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. INHALATION RISK: No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes and the skin. The substance may cause effects on the central nervous system. Exposure could cause lowering of consciousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. This substance is possibly carcinogenic to humans. PHYSICAL PROPERTIES Boiling point: 194°C Melting point: -36.6°C Relative density (water = 1): 1.052 Solubility in water: poor Vapour pressure, Pa at 20°C: 40 Relative vapour density (air = 1): 4.30 Flash point: 76°C c.c. Auto-ignition temperature: 498°C Explosive limits, vol% in air: approx. 1.1-22 ENVIRONMENTAL DATA Toxic to fish. N O T E S NFPA Code: H2; F2; R0 ADDITIONAL INFORMATION ICSC: 1201 STYRENE OXIDE (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.