International Chemical Safety Cards 1,3-PENTADIENE ICSC: 1722 Penta-1,3-diene 1-Methylbutadiene Piperylene CH2(CH)3CH3 Molecular mass: 68.1 ICSC #    1722 CAS #     504-60-9 RTECS # RZ2464000 UN #        3295 November 13, 2008 Validated TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Highly flammable. NO open flames, NO sparks, and NO smoking. Water spray, foam, powder, carbon dioxide. EXPLOSION Vapour/air mixtures are explosive. Heating will cause rise in pressure with risk of bursting. Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling. Use non-sparking handtools. In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE PREVENT GENERATION OF MISTS!  •INHALATION Ventilation. Fresh air, rest. Seek medical attention if you feel unwell  •SKIN Redness. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention if skin irritation occurs.  •EYES Redness. Safety spectacles . Rinse with plenty of water (remove contact lenses if easily possible).  •INGESTION Nausea. Vomiting. Aspiration hazard! Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Seek medical attention if you feel unwell SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Evacuate danger area! Consult an expert! Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Remove all ignition sources. Ventilation. Collect leaking liquid in covered containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. Separated from strong oxidants. Fireproof. Store in an area without drain or sewer access. Ventilation along the floor. UN Hazard Class: 3 UN Packing Group: II Signal: Danger Flame-Health haz Highly flammable liquid and vapour. May be harmful if swallowed May be harmful if inhaled vapour Causes mild skin irritation Causes eye irritation May be harmful if swallowed and enters airways SEE IMPORTANT INFORMATION ON BACK ICSC: 1722 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 1,3-PENTADIENE ICSC: 1722 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS LIQUID PHYSICAL DANGERS: The vapour is heavier than air and may travel along the ground; distant ignition possible. CHEMICAL DANGERS: Reacts violently with strong oxidants. Can form peroxides which may initiate a polymerisation reaction. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The vapour is irritating to the eyes and the skin. If swallowed the substance may cause vomiting, and could result in aspiration pneumonitis. The effects may be delayed. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 42°C Melting point: -87°C Density: 0.7 g/cm³ (very poor) Solubility in water, g/100 ml: 0.069 Vapour pressure, kPa at 25°C: 53.3 Relative vapour density (air = 1): 2.35 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.7 Flashpoint: -28°C c.c. Explosive limits, vol% in air: 2.0 - 8.3 Octanol/water partition coefficient as log Pow: 1.5 (estimated) ENVIRONMENTAL DATA N O T E S The commercial mixture of 1,3-pentadiene consists of 80% of the trans-isomer (CAS 2004-70-8) and 20% of the cis-isomer (CAS 1574-41-0). CAS 504-60-9 is for unspecified or mixed isomer. Do NOT take working clothes home. Transport Emergency Card: TEC (R)-30GF1-I+II. NFPA Code: H2; F3; R2; ADDITIONAL INFORMATION ICSC: 1722 1,3-PENTADIENE (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.