International Chemical Safety Cards 5-ETHYLIDENE-2-NORBORNENE (stabilized) ICSC: 0473 ENB 5-Ethylidenebicyclo(2,2,1)hep-2-ene Ethylidene norbornene C9H12 Molecular mass: 120.2 ICSC #    0473 CAS #     16219-75-3 RTECS # RB9450000 UN #        1992 March 26, 1999 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Flammable. NO open flames, NO sparks, and NO smoking. Powder, AFFF, foam, carbon dioxide. NO water. EXPLOSION Above 38°C explosive vapour/air mixtures may be formed. Above 38°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. Combat fire from a sheltered position. EXPOSURE  •INHALATION Confusion. Cough. Headache. Shortness of breath. Sore throat. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Pain. Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.  •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 Nausea. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. 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: self-contained breathing apparatus). Fireproof. Separated from strong oxidants, food and feedstuffs . Cool. Keep under inert gas. Store only if stabilized. Airtight. Do not transport with food and feedstuffs. R: S: UN Hazard Class: 3 UN Subsidiary Risks: 6.1 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 0473 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 5-ETHYLIDENE-2-NORBORNENE (stabilized) ICSC: 0473 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE TO COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: As a result of flow, agitation, etc., electrostatic charges can be generated. CHEMICAL DANGERS: The substance may polymerize. The substance decomposes on burning producing acrid smoke and irritating fumes. Reacts with strong oxidants. OCCUPATIONAL EXPOSURE LIMITS: TLV: 5 ppm (as ceiling) (ACGIH 1998). OSHA PEL: none NIOSH REL: C 5 ppm (25 mg/m3) NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. INHALATION RISK: A harmful contamination of the air can be reached rather quickly 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. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the liver andkidneys. PHYSICAL PROPERTIES Boiling point: 148°C Melting point: -80°C Relative density (water = 1): 0.9 Solubility in water: none Vapour pressure, Pa at 20°C: 560 Relative vapour density (air = 1): 4.1 Flash point: 38°C o.c. ENVIRONMENTAL DATA N O T E S The occupational exposure limit value should not be exceeded during any part of the working exposure. An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. Transport Emergency Card: TEC (R)-30G32 ADDITIONAL INFORMATION ICSC: 0473 5-ETHYLIDENE-2-NORBORNENE (stabilized) (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.