International Chemical Safety Cards 2,3,4-TRICHLORO-1-BUTENE ICSC: 0587 2,3,4-Trichlorobutene-1 C4H5Cl3 Molecular mass: 159.4 ICSC #    0587 CAS #     2431-50-7 RTECS # EM9046000 UN #        2322 EC #         602-076-00-6 April 21, 2004 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION Above 63°C explosive vapour/air mixtures may be formed. Above 63°C use a closed system, ventilation, and explosion-proof electrical equipment. EXPOSURE AVOID ALL CONTACT!  •INHALATION Cough. Sore throat. Dullness. Nausea. Closed system. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Pain. Protective gloves. Protective clothing. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. 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 Do not eat, drink, or smoke during work. Wash hands before eating. Give plenty of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Do NOT let this chemical enter the environment. Remove all ignition sources. Cover the spilled material with plastic sheet. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Personal protection: filter respirator for organic gases and vapours. Provision to contain effluent from fire extinguishing. Separated from incompatible materials . See Chemical Dangers. Well closed. Marine pollutant. T symbol N symbol R: 22-23-36/37/38-40-50/53 S: 1/2-36/37-45-60-61 UN Hazard Class: 6.1 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 0587 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 2,3,4-TRICHLORO-1-BUTENE ICSC: 0587 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS LIQUID . PHYSICAL DANGERS: CHEMICAL DANGERS: Reacts with reducing agents and strong oxidants . The substance decomposes on heating and on burning producing toxic and corrosive fumes . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK: H; Carcinogen category: 2; (DFG 2003). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its vapour and by ingestion . INHALATION RISK: A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The vapour is irritating to the eyes , the skin and the respiratory tract . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the respiratory tract , resulting in tissue lesions . PHYSICAL PROPERTIES Boiling point: 155-162°C Melting point: -52°C Density: 1.34 g/cm3 Solubility in water, g/100 ml at 20°C: 0.06 Vapour pressure, Pa at 20°C: 230 Flash point: 63°C c.c. Octanol/water partition coefficient as log Pow: 2.4 (calculated) ENVIRONMENTAL DATA The substance is harmful to aquatic organisms. The substance may cause long-term effects in the aquatic environment. It is strongly advised that this substance does not enter the environment. N O T E S Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. Transport Emergency Card: TEC (R)-61GT1-II ADDITIONAL INFORMATION ICSC: 0587 2,3,4-TRICHLORO-1-BUTENE (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.