International Chemical Safety Cards 3-METHYL-2-BUTANONE ICSC: 0922 Methyl isopropyl ketone 2-Acetyl propane C5H10O Molecular mass: 86.13 ICSC #    0922 CAS #     563-80-4 RTECS # EL9100000 UN #        2397 EC #         606-007-00-0 March 25, 1996 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Highly flammable. NO open flames, NO sparks, and NO smoking. Foam, powder, carbon dioxide. EXPLOSION Vapour/air mixtures are explosive. Closed system, ventilation, explosion-proof electrical equipment and lighting. In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!  •INHALATION Burning sensation. Cough. Laboured breathing. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN MAY BE ABSORBED! Redness. Protective gloves. 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 Nausea. Vomiting. Weakness. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Absorb remaining liquid in dry sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. (Extra personal protection: A filter respirator for organic vapour). Fireproof. Separated from flammable susbstances, strong oxidants. Well closed. F symbol R: 11 S: 2-9-16-33 UN Hazard Class: 3 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 0922 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 3-METHYL-2-BUTANONE ICSC: 0922 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 is heavier than air and may travel along the ground; distant ignition possible. The vapour mixes well with air, explosive mixtures are easily formed. CHEMICAL DANGERS: The substance decomposes on heating producing irritating fumes. Reacts vigorously with oxidants. OCCUPATIONAL EXPOSURE LIMITS: TLV: 200 ppm; 70 mg/m3 (as TWA) (ACGIH 1995-1996). MAK not established. OSHA PEL: none NIOSH REL: TWA 200 ppm (705 mg/m3) NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion. INHALATION RISK: A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system , resulting in narcosis and weakness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The liquid defats the skin. PHYSICAL PROPERTIES Boiling point: 93-95°C Melting point: -92°C Relative density (water = 1): 0.80 Solubility in water, g/100 ml at 20°C: 0.6 Vapour pressure, kPa at 20°C: 5.5 Relative vapour density (air = 1): 2.9 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.10 Flash point: -1°C Auto-ignition temperature: 475°C Explosive limits, vol% in air: 1.2-8 ENVIRONMENTAL DATA N O T E S ADDITIONAL INFORMATION ICSC: 0922 3-METHYL-2-BUTANONE (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.