International Chemical Safety Cards DIVINYLBENZENE (MIXED ISOMERS) ICSC: 0885 Vinylstyrene DVB C10H10 / C6H4(CH=CH2)2 Molecular mass: 130.20 ICSC #    0885 CAS #     1321-74-0 RTECS # CZ9370000 April 11, 1997 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Heating will cause rise in pressure with risk of bursting. NO open flames. Powder, AFFF, foam, 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: keep drums, etc., cool by spraying with water. EXPOSURE PREVENT GENERATION OF MISTS!  •INHALATION Cough. Sore throat. Ventilation, local exhaust, or breathing protection. Fresh air, rest.  •SKIN Redness. Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Do NOT induce vomiting. Rest. 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. (Extra personal protection: filter respirator for organic gases and vapours). Separated from oxidants. Cool. Store only if stabilized. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 0885 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 DIVINYLBENZENE (MIXED ISOMERS) ICSC: 0885 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance can polymerize due to heating with fire or explosion hazard. Reacts violently with oxidants. OCCUPATIONAL EXPOSURE LIMITS: TLV: 10 ppm; 53 mg/m3 (ACGIH 1996). NIOSH REL: TWA 10 ppm (50 mg/m3) NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its vapour. 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, the skin and the respiratory tract. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. PHYSICAL PROPERTIES Boiling point: 195°C Melting point: -66.9 - -52°C Relative density (water = 1): 0.9 Solubility in water: none Vapour pressure, Pa at 32.7°C: 133 Relative vapour density (air = 1): 4.48 Flash point: 76°C o.c. Auto-ignition temperature: 500°C Explosive limits, vol% in air: 1.1-6.2 Octanol/water partition coefficient as log Pow: 3.59 (estimated) ENVIRONMENTAL DATA N O T E S The commercial form of vinylbenzene contains the three isomeric forms but the meta isomer predominates. Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. DVB-22, DVB-55 are trade names. Also consult ICSC # 0073 on Styrene. NFPA Code: H2; F2; R2; ADDITIONAL INFORMATION ICSC: 0885 DIVINYLBENZENE (MIXED ISOMERS) (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.