International Chemical Safety Cards PROPYLENE OXIDE ICSC: 0192 PROPYLENE OXIDE 1,2-Epoxypropane Methyloxirane Methyl ethylene oxide Propene oxide CH3CHCH2O/C3H6O Molecular mass: 58.1 CAS # 75-56-9 RTECS # TZ2975000 ICSC # 0192 UN # 1280 EC # 603-055-00-4 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Extremely flammable. Heating will cause rise in pressure with risk of bursting. NO open flames, NO sparks, and NO smoking. Powder, alcohol-resistant foam, water spray, carbon dioxide. EXPLOSION Vapour/air mixtures are explosive. 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. Combat fire from a sheltered position. EXPOSURE STRICT HYGIENE! INHALATION Cough. Sore throat. Ventilation, local exhaust, or breathing protection. Fresh air, rest. SKIN Redness. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower. EYES Redness. Pain. Safety goggles or eye protection in combination with breathing protection. 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. Give plenty of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Evacuate danger area! Consult an expert! Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer (extra personal protection: complete protective clothing including self-contained breathing apparatus). Fireproof. Separated from acids, bases, oxidants. Cool. Unbreakable packaging; put breakable packaging into closed unbreakable container. F+ symbol T symbol R: 45-12-20/21/22-36/37/38 S: 53-45 Note: E UN Hazard Class: 3 UN Packing Group: I SEE IMPORTANT INFORMATION ON BACK ICSC: 0192 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

International Chemical Safety Cards PROPYLENE OXIDE ICSC: 0192 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: VERY VOLATILE COLOURLESS LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: The vapour is heavier than air and may travel along the ground; distant ignition possible. CHEMICAL DANGERS: The substance may polymerize violently under the influence of bases, acids and metal chlorides with fire or explosion hazard. Reacts violently with chlorine, ammonia, strong oxidants, acids causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV: 20 ppm; 48 mg/m3 (as TWA) (ACGIH 1994-1995). OSHA PEL: TWA 100 ppm (240 mg/m3) NIOSH REL: Ca See Appendix A NIOSH IDLH: Potential occupational carcinogen 400 ppm ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. INHALATION RISK: A harmful contamination of the air can be reached very 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. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. This substance is possibly carcinogenic to humans. PHYSICAL PROPERTIES Boiling point: 34°C Melting point: -104°C Relative density (water = 1): 0.8 Solubility in water, g/100 ml at 20°C: 40.5 Vapour pressure, kPa at 20°C: 59 Relative vapour density (air = 1): 2.0 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.6 Flash point: -37°C c.c. Auto-ignition temperature: 449°C Explosive limits, vol% in air: 2-38.5 Octanol/water partition coefficient as log Pow: 0.03 ENVIRONMENTAL DATA N O T E S No odour warning if toxic concentrations are present. Transport Emergency Card: TEC (R)-158 NFPA Code: H2; F4; R2 ADDITIONAL INFORMATION ICSC: 0192 PROPYLENE OXIDE © IPCS, CEC, 1993

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 IDLH values.