International Chemical Safety Cards o-DIETHYLBENZENE ICSC: 0445 Diethylbenzene C6H4(C2H5)2 Molecular mass: 134.2 ICSC #    0445 CAS #     25340-17-4 RTECS # CZ5600000 UN #        2049 March 25, 1996 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, carbon dioxide. EXPLOSION EXPOSURE PREVENT GENERATION OF MISTS!  •INHALATION Cough. Dizziness. Headache. Unconsciousness. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Pain. Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. Safety spectacles, 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 Confusion. Dizziness. Drowsiness. Headache. Unconsciousness. Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. 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: A/P2 filter respirator for organic vapour and harmful dust). Separated from strong oxidants. Well closed. R: S: UN Hazard Class: 3 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 0445 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 o-DIETHYLBENZENE ICSC: 0445 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: The vapour mixes well with air, explosive mixtures are easily formed. CHEMICAL DANGERS: Reacts violently with oxidants causing fire and explosion hazard. Attacks rubber. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its vapour and by ingestion. 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: The substance is irritating to the eyes and the skin . The substance may cause effects on the central nervous system , resulting in headache, dizziness and unconsiousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The liquid defats the skin. The substance may have effects on the liver and kidneys. PHYSICAL PROPERTIES Boiling point: 184°C Melting point: -31°C Relative density (water = 1): 0.86 Solubility in water: none Vapour pressure, kPa at 20°C: 0.1 Relative vapour density (air = 1): 4.6 Flash point: 55°C c.c. Auto-ignition temperature: 380°C ENVIRONMENTAL DATA The substance is harmful to aquatic organisms. N O T E S Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. NFPA Code: H2; F2; R0 ADDITIONAL INFORMATION ICSC: 0445 o-DIETHYLBENZENE (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.