International Chemical Safety Cards p-tert-BUTYLTOLUENE ICSC: 1068 1-Methyl-4-tert-butylbenzene 4-tert-Butyltoluene p-TBT C11H16/ CH3C6H4C(CH3)3 Molecular mass: 148.3 ICSC #    1068 CAS #     98-51-1 RTECS # XS8400000 UN #        2667 April 20, 2007 Validated TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Water spray, alcohol-resistant foam, dry powder, carbon dioxide. EXPLOSION Above 63°C explosive vapour/air mixtures may be formed. Above 63°C use a closed system, ventilation. EXPOSURE  •INHALATION Cough. Sore throat. Metallic taste. Laboured breathing. Nausea. Dizziness. Headache. Tremor. Weakness. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Half-upright position. Refer immediately for medical attention.  •SKIN Redness. Protective gloves. Rinse and then wash skin with water and soap.  •EYES Redness. Pain. Safety spectacles or eye protection in combination with breathing protection. Rinse with plenty of water (remove contact lenses if easily possible).  •INGESTION Confusion. Convulsions. ( See Inhalation). Do not eat, drink, or smoke during work. Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: self-contained breathing apparatus. Do NOT let this chemical enter the environment. Ventilation. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Separated from food and feedstuffs, strong oxidants. Well closed. Keep in a well-ventilated room. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. Do not transport with food and feedstuffs. Marine pollutant. UN Hazard Class: 6.1 UN Packing Group: III Signal: Danger Skull-Health haz Combustible liquid Harmful if swallowed Fatal if inhaled Causes eye irritation May cause damage to CNS through prolonged or repeated exposure if inhaled May cause respiratory irritation Toxic to aquatic life SEE IMPORTANT INFORMATION ON BACK ICSC: 1068 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 p-tert-BUTYLTOLUENE ICSC: 1068 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO YELLOW LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: As a result of flow, agitation, etc., electrostatic charges can be generated. CHEMICAL DANGERS: The substance decomposes on burning producing toxic fumes. Reacts with strong oxidants causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV: 1 ppm (as TWA). (ACGIH 2006) MAK: IIb (not established but data is available). (DFG 2006). 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 is irritating to the eyes and the respiratory tract. Exposure far above the OEL could cause lowering of consciousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the central nervous system, resulting in tissue lesions. PHYSICAL PROPERTIES Boiling point at 101.3kPa: 193°C Melting point: -62.5°C Relative density (water = 1): 0.86 Solubility in water, g/100 ml at 20°C: (very poor) 0.06 Vapour pressure, Pa at 20°C: 80 Relative vapour density (air = 1): 5.1 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00 Flashpoint: 63°C c.c. Auto-ignition temperature: 510°C Explosive limits, vol% in air: 0.7-7.1 Octanol/water partition coefficient as log Pow: 4.35 ENVIRONMENTAL DATA The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur in aquatic organisms. It is strongly advised that this substance does not enter the environment. N O T E S The odour warning when the exposure limit value is exceeded is insufficient. Transport Emergency Card: TEC (R)-61S2667 or TEC (R)-61GT1-III Card has been partially updated in January 2008: see GHS classification. ADDITIONAL INFORMATION ICSC: 1068 p-tert-BUTYLTOLUENE (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.