International Chemical Safety Cards 1,2-DICHLOROBENZENE ICSC: 1066 ortho-Dichlorobenzene C6H4Cl2 Molecular mass: 147.0 ICSC #    1066 CAS #     95-50-1 RTECS # CZ4500000 UN #        1591 EC #         602-034-00-7 November 26, 2003 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION Above 66°C explosive vapour/air mixtures may be formed. Above 66°C use a closed system, ventilation. EXPOSURE  •INHALATION Cough. Drowsiness. Sore throat. Unconsciousness. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Redness. Pain. Dry skin. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.  •EYES Redness. Pain. Face shield. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Burning sensation. Diarrhoea. Nausea. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. Give plenty of water to drink. Do NOT induce vomiting. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING 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 let this chemical enter the environment. (Extra personal protection: filter respirator for organic gases and vapours.) Separated from aluminium , oxidants and food and feedstuffs . Do not transport with food and feedstuffs. Marine pollutant. Xn symbol N symbol R: 22-36/37/38-50/53 S: 2-23-60-61 UN Hazard Class: 6.1 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 1066 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 1,2-DICHLOROBENZENE ICSC: 1066 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO YELLOW LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on burning producing toxic and corrosive gases including hydrogen chloride . Reacts with aluminium and oxidants . Attacks plastic and rubber. OCCUPATIONAL EXPOSURE LIMITS: TLV: 25 ppm as TWA; 50 ppm as STEL; A4; (ACGIH 2003). MAK: 10 ppm, 61 mg/m³; H; Peak limitation category: II(2); Pregnancy risk group: C; (DFG 2003). OSHA PEL: C 50 ppm (300 mg/m3) NIOSH REL: C 50 ppm (300 mg/m3) NIOSH IDLH: 200 ppm ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, 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 is irritating to the eyes , the skin and the respiratory tract . The substance may cause effects on the central nervous system and liver . Exposure could cause lowering of consciousness. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The liquid defats the skin. The substance may have effects on the kidneys , blood . PHYSICAL PROPERTIES Boiling point: 180-183°C Melting point: -17°C Relative density (water = 1): 1.3 Solubility in water: very poor Vapour pressure, kPa at 20°C: 0.16 Relative vapour density (air = 1): 5.1 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.006 Flash point: 66°C c.c. Auto-ignition temperature: 648°C Explosive limits, vol% in air: 2.2-9.2 Octanol/water partition coefficient as log Pow: 3.38 ENVIRONMENTAL DATA The substance is toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish. It is strongly advised that this substance does not enter the environment. N O T E S Transport Emergency Card: TEC (R)-61GT1-III NFPA Code: H2; F2; R0; ADDITIONAL INFORMATION ICSC: 1066 1,2-DICHLOROBENZENE (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.