International Chemical Safety Cards 2-METHOXY-2-METHYLBUTANE ICSC: 1496 tert-Amyl methyl ether TAME tert-Pentyl methyl ether 1,1-Dimethyl propylmethyl ether Methyl-tert-pentyl ether C6H14O Molecular mass: 102.2 ICSC #    1496 CAS #     994-05-8 RTECS # EK4421000 UN #        3271 April 22, 2004 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Extremely flammable. NO open flames, NO sparks, and NO smoking. Foam, alcohol-resistant foam, dry powder, carbon dioxide. EXPLOSION Vapour/air mixtures are explosive. In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE  •INHALATION Dizziness. Drowsiness. Weakness. Ventilation, local exhaust, or breathing protection. Fresh air, rest.  •SKIN Dry skin. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION (See Inhalation). Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Ventilation. Remove all ignition sources. 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. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. Personal protection: filter respirator for organic gases and vapours. Fireproof. R: S: UN Hazard Class: 3 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 1496 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 2-METHOXY-2-METHYLBUTANE ICSC: 1496 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. CHEMICAL DANGERS: OCCUPATIONAL EXPOSURE LIMITS: TLV: 20 ppm as TWA; (ACGIH 2004). MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation 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: If this liquid is swallowed, aspiration into the lungs may result in chemical pneumonitis. Exposure at high levels could cause lowering of consciousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The liquid defats the skin. PHYSICAL PROPERTIES Boiling point: 86.3°C Melting point: -80°C Relative density (water = 1): 0.77 Solubility in water: 1.1 g/100 ml at 20 °C Vapour pressure, kPa at 20°C: 9 Relative vapour density (air = 1): 3.6 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2 Flash point: -11°C Auto-ignition temperature: 430°C Explosive limits, vol% in air: 1.1-7.1 Octanol/water partition coefficient as log Pow: 1.6 ENVIRONMENTAL DATA This substance may be hazardous in the environment; special attention should be given to ground water contamination. N O T E S Card has been partly updated in April 2005. See section Occupational Exposure Limits. Transport Emergency Card: TEC (R)-30GF1-I+II ADDITIONAL INFORMATION ICSC: 1496 2-METHOXY-2-METHYLBUTANE (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.