International Chemical Safety Cards STYRENE ICSC: 0073 STYRENE Vinylbenzene Phenylethylene Ethenylbenzene C8H8/C6H5CH=CH2 Molecular mass: 104.1 CAS # 100-42-5 RTECS # WL3675000 ICSC # 0073 UN # 2055 (styrene monomer, inhibited) EC # 601-026-00-0 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Flammable. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames, NO sparks, and NO smoking. Powder, AFFF, foam, carbon dioxide. EXPLOSION Above 31°C explosive vapour/air mixtures may be formed. See Notes. Above 31°C use a closed system, ventilation, and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding). In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE AVOID ALL CONTACT! INHALATION Dizziness. Drowsiness. Headache. Nausea. Weakness. Ventilation, local exhaust, or breathing protection. Fresh air, rest. SKIN Redness. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap. EYES Redness. Pain. Safety goggles 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 (further see Inhalation). Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Rest. 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. Do NOT wash away into sewer. Do NOT let this chemical enter the environment (extra personal protection: self-contained breathing apparatus). Fireproof. Separated from incompatible materials (see Chemical Dangers). Cool. Keep in the dark. Store only if stabilized. Airtight. Xn symbol R: 10-20-36/38 S: (2-)23 Note: D UN Hazard Class: 3 UN Packing Group: III Marine pollutant. SEE IMPORTANT INFORMATION ON BACK ICSC: 0073 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

International Chemical Safety Cards STYRENE ICSC: 0073 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO YELLOW, OILY LIQUID. PHYSICAL DANGERS: As a result of flow, agitation, etc., electrostatic charges can be generated. CHEMICAL DANGERS: The substance can form explosive peroxides. The substance may polymerize due to warming, under the influence of light and on contact with many compounds such as oxygen, oxidizing agents, peroxides and strong acids with fire or explosion hazard. The substance decomposes on burning producing toxic fumes, styrene oxide. Attacks copper and copper alloys. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV: 50 ppm; 213 mg/m3 STEL: 100ppm; 426 mg/m3 (skin) (ACGIH 1993-1994). OSHA PEL: TWA 100 ppm C 200 ppm 600 ppm (5-minute maximum peak in any 3 hours) NIOSH REL: TWA 50 ppm (215 mg/m3) ST 100 ppm (425 mg/m3) NIOSH IDLH: 700 ppm ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and through the skin. 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. Swallowing the liquid may cause aspiration into the lungs with the risk of chemical pneumonitis. Exposure could cause lowering of consciousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma. The substance may have effects on the central nervous system. This substance is possibly carcinogenic to humans. See Notes. PHYSICAL PROPERTIES Boiling point: 145°C Melting point: -30.6°C Relative density (water = 1): 0.9 Solubility in water, g/100 ml at 25°C: 0.03 Vapour pressure, kPa at 20°C: 0.7 Relative vapour density (air = 1): 3.6 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.02 Flash point: 31°C c.c. Auto-ignition temperature: 490°C Explosive limits, vol% in air: 0.9-6.8 Octanol/water partition coefficient as log Pow: 3.2 ENVIRONMENTAL DATA N O T E S Depending on the degree of exposure, periodic medical examination is indicated. The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance. An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. Check for peroxides prior to distillation; eliminate if found. Styrene monomer vapours are uninhibited and may form polymers in vents or flame arresters of storage tanks, resulting in blockage of vents. Transport Emergency Card: TEC (R)-101 (monomer, inhibited) NFPA Code: H 2; F 3; R 2; ADDITIONAL INFORMATION ICSC: 0073 STYRENE © IPCS, CEC, 1993

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 IDLH values.