International Chemical Safety Cards POLYSTYRENE ICSC: 1043 Benzene, ethenyl-, homopolymer Ethenylbenzene, homopolymer (C8H8)x Molecular mass: 10 000-300 000 ICSC #    1043 CAS #     9003-53-6 RTECS # WL6475000 November 25, 2003 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Avoid inhalation of dust .  •SKIN  •EYES Safety goggles, or eye protection in combination with breathing protection if powder.  •INGESTION SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Ventilation. Remove all ignition sources. Sweep spilled substance into labelled and suitable containers. (Extra personal protection: P1 filter respirator for inert particles.) R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1043 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 POLYSTYRENE ICSC: 1043 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS SOLID IN VARIOUS FORMS PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating above 300°C producing toxic fumesincluding styrene. The substance decomposes on burning producing irritating fumes . Reacts with strong oxidants . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: INHALATION RISK: A nuisance-causing concentration of airborne particles can be reached quickly when dispersed, especially if powdered. EFFECTS OF SHORT-TERM EXPOSURE: May cause mechanical irritation. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Melting point: 240°C Relative density (water = 1): 1.04-1.13 Flash point: 345-360°C Auto-ignition temperature: 427°C ENVIRONMENTAL DATA N O T E S ADDITIONAL INFORMATION ICSC: 1043 POLYSTYRENE (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.