International Chemical Safety Cards CUMENE HYDROPEROXIDE ICSC: 0761 CUMENE HYDROPEROXIDE alpha,alpha-Dimethylbenzyl hydroperoxide 1-Methyl-1-phenylethyl hydroperoxide Cumyl hydroperoxide C9H12O2 / C6H5C(CH3)2OOH Molecular mass: 152.2 CAS # 80-15-9 RTECS # MX2450000 ICSC # 0761 UN # 3109 EC # 617-002-00-8 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. NO contact with flammable substances. Powder, water spray, foam, carbon dioxide. EXPLOSION Above 79°C explosive vapour/air mixtures may be formed. Risk of fire and explosion on contact with organic, combustible and reducing materials. Above 79°C use a closed system, ventilation. In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. EXPOSURE PREVENT GENERATION OF MISTS! AVOID ALL CONTACT! INHALATION Sore throat. Cough. Burning sensation. Shortness of breath. Symptoms may be delayed (see Notes). Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Artificial respiration if indicated. Refer for medical attention. SKIN Pain. Blisters. Protective gloves. Protective clothing. First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention. EYES Pain. Redness. Severe deep burns. Face shield, 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 Abdominal pain. Burning sensation. Shock or collapse. Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Consult an expert! Collect leaking and spilled liquid in covered containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT absorb in saw-dust or other combustible absorbents (extra personal protection: chemical suit with self-contained breathing apparatus). Separated from combustible and reducing substances, mineral acids, food and feedstuffs. Cool. Dry. Do not transport with food and feedstuffs. Store only in original packaging. O symbol Xn symbol C symbol R: 7-34-20/22 S: (1/2)3/7-14-36/37/39-45-50 UN Hazard Class: 5.2 UN Subsidiary Risks: 8 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 0761 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 CUMENE HYDROPEROXIDE ICSC: 0761 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO PALE YELLOW LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: May explode on heating at about 150°C. The substance is a strong oxidant and reacts violently with combustible and reducing materials, causing fire and explosion hazard. Contact with cobalt, copper or lead alloys and mineral acids may lead to violent decomposition. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying. EFFECTS OF SHORT-TERM EXPOSURE: Corrosive. The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of the aerosol of this substance may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Melting point: -10°C Relative density (water = 1): 1.05 Solubility in water, g/100 ml: 1.5g/100ml Vapour pressure, Pa at 20°C: 32 Relative vapour density (air = 1): 5.4 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.0 Flash point: 79°C Explosive limits, vol% in air: 0.9-6.5 Octanol/water partition coefficient as log Pow: -0.16 ENVIRONMENTAL DATA N O T E S The technical product can contain a certain amount of cumene (10-20%) which changes physical properties. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered. Rinse contaminated clothes (fire hazard) with plenty of water. Transport Emergency Card: TEC (R)-649 NFPA Code: H1; F2; R4; OX ADDITIONAL INFORMATION ICSC: 0761 CUMENE HYDROPEROXIDE © 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.