International Chemical Safety Cards ACETAL ICSC: 1070 1,1-Diethoxyethane Ethylidene diethyl ether Diethylacetal Acetaldehyde diethyl acetal C6H14O2 Molecular mass: 118.20 ICSC #    1070 CAS #     105-57-7 RTECS # AB2800000 UN #        1088 EC #         605-015-00-1 November 25, 2003 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. Powder, AFFF, foam, carbon dioxide. EXPLOSION Vapour/air mixtures are explosive. Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling. Use non-sparking handtools. In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE  •INHALATION Cough. Dizziness. Drowsiness. Headache. Nausea. Sore throat. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Diarrhoea. Nausea. Vomiting. Do not eat, drink, or smoke during work. 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 covered containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. (Extra personal protection: filter respirator for organic gases and vapours.) Fireproof. Separated from strong oxidants. Cool. Keep in the dark. Well closed. Store only if stabilized. Airtight. F symbol Xi symbol R: 11-36/38 S: 2-9-16-33 UN Hazard Class: 3 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 1070 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 ACETAL ICSC: 1070 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS LIQUID , WITH PUNGENT ODOUR. PHYSICAL DANGERS: The vapour is heavier than air and may travel along the ground; distant ignition possible. CHEMICAL DANGERS: The substance can form explosive peroxides under the influence of lightandair. The substance may polymerize on standing. Reacts violently with oxidants causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK 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, the skin and the respiratory tract. Exposure may result in lowering of consciousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Boiling point: 103°C Melting point: -100°C Relative density (water = 1): 0.83 Solubility in water, g/100 ml: 5.0 Vapour pressure, kPa at 20°C: 2.7 Relative vapour density (air = 1): 4.1 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.08 Flash point: -21°C c.c. Auto-ignition temperature: 230°C Explosive limits, vol% in air: 1.6-10.4 Octanol/water partition coefficient as log Pow: 0.84 ENVIRONMENTAL DATA N O T E S An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. Check for peroxides prior to distillation; eliminate if found. Transport Emergency Card: TEC (R)-30S1088 NFPA Code: H0; F3; R0; ADDITIONAL INFORMATION ICSC: 1070 ACETAL (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.