International Chemical Safety Cards BENZOFURAN ICSC: 0388 2,3-Benzofuran Coumarone C8H6O Molecular mass: 118.1 ICSC #    0388 CAS #     271-89-6 RTECS # DF6423800 UN #        1993 March 07, 2002 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Flammable. NO open flames, NO sparks, and NO smoking. Foam, dry powder, carbon dioxide. EXPLOSION Above 56°C explosive vapour/air mixtures may be formed. Above 56°C use a closed system, ventilation, and explosion-proof electrical equipment. In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE AVOID ALL CONTACT!  •INHALATION See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.  •SKIN  •EYES  •INGESTION SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Remove all ignition sources. Collect leaking liquid in covered containers. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. Fireproof. Well closed. Cool. R: S: UN Hazard Class: 3 UN Subsidiary Risks: III SEE IMPORTANT INFORMATION ON BACK ICSC: 0388 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 BENZOFURAN ICSC: 0388 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS OILY LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance will slowly polymerize at ambient temperatures, but more rapidly under the influence of heat and under the influence of acidic catalyst. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol . 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: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the kidneys and liver . This substance is possibly carcinogenic to humans. PHYSICAL PROPERTIES Boiling point: 174°C Melting point: <-18°C Relative density (water = 1): 1.09 Solubility in water: none Vapour pressure, kPa at 25°C: 0.06 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00 Flash point: 56°C Octanol/water partition coefficient as log Pow: 2.67 ENVIRONMENTAL DATA The substance is harmful to aquatic organisms. It is strongly advised that this substance does not enter the environment. N O T E S Explosive limits are unknown in literature, although the substance is combustible and has a flash point < 61°C. Do NOT take working clothes home. Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. ADDITIONAL INFORMATION ICSC: 0388 BENZOFURAN (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.