3-METHYL-2-BUTENAL ICSC: 1294 3,3-Dimethylacrolein 3-Methylcrotonaldehyde C5H8O Molecular mass: 84.12 ICSC #    1294 CAS #     107-86-8 UN #        2924 Types of Hazard/ Exposure Acute Hazards/ Symptoms Prevention First Aid/ Fire Fighting FIRE Flammable. NO open flames, NO sparks, and NO smoking. NO contact with hot surfaces. Powder, AFFF, foam, carbon dioxide. Explosion Above 37°C explosive vapour/air mixtures may be formed. Above 37°C use a closed system, ventilation, and explosion-proof electrical equipment. In case of fire: keep drums, etc., cool by spraying with water. Exposure  •Inhalation Burning sensation. Cough. Sore throat. Drowsiness. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •Skin Redness. Skin burns. Pain. Blisters. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.  •Eyes Redness. Pain. Blurred vision. 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. Nausea. Shock or collapse. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention. Spillage Disposal Storage Packaging & Labelling Remove all ignition sources. Collect leaking liquid in sealable containers. Wash away spilled liquid with plenty of water. Do NOT wash away into sewer. (Extra personal protection: complete protective clothing including self-contained breathing apparatus). Fireproof. Well closed. UN Hazard Class: 3 UN Subsidiary Risks: 8 UN Packing Group: III 3-METHYL-2-BUTENAL ICSC: 1294 Important Data Physical State; Appearance: COLOURLESS TO YELLOW LIQUID , WITH PUNGENT ODOUR. Physical Dangers: Chemical Dangers: Occupational Exposure Limits: TLV not established. Routes of Exposure: The substance can be absorbed into the body by inhalation of its vapour, through the skin 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 irritates the respiratory tract and is corrosive to the eyes and the skin. Exposure could cause lowering of consciousness. Medical observation is indicated. Effects of Long-Term or Repeated Exposure: Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the respiratory tract , resulting in tissue lesions. Physical Properties Boiling point: 136°C Melting point: -20°C Density: 0.9 g/cm3 Solubility in water, g/100 ml at 15°C: 11 Vapour pressure, kPa at 20°C: 0.75 Relative vapour density (air = 1): 2.9 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.014 Flash point: 37°C Auto-ignition temperature: 145°C Explosive limits, vol% in air: 1.8-7 Octanol/water partition coefficient as log Pow: 0.53 Environmental Data The substance is harmful to aquatic organisms. N O T E S Prenal is a trade name. Transport Emergency Card: TEC (R)-30G35 ADDITIONAL INFORMATION ICSC: 1294 3-METHYL-2-BUTENAL (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.