International Chemical Safety Cards o-PHENYLENEDIAMINE ICSC: 1441 o-Diaminobenzene 1,2-Benzenediamine 2-Aminoaniline 1,2-Phenylenediamine C6H8N2 / C6H4 (NH2)2 Molecular mass: 108.16 ICSC #    1441 CAS #     95-54-5 RTECS # SS7875000 UN #        1673 EC #         612-145-00-2 October 09, 2002 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. Water spray, powder. EXPLOSION Finely dispersed particles form explosive mixtures in air. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. EXPOSURE STRICT HYGIENE!  •INHALATION Blue lips or finger nails. Blue skin. Confusion. Convulsions. Dizziness. Headache. Nausea. Unconsciousness. Local exhaust or breathing protection. Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.  •SKIN Redness. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •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 (See Inhalation). Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. (Extra personal protection: P3 filter respirator for toxic particles.) Separated from food and feedstuffs . Well closed. Do not transport with food and feedstuffs. Note: C T symbol N symbol R: 20/21-25-36-40-43-50/53-68 S: 1/2-28-36/37-45-60-61 UN Hazard Class: 6.1 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 1441 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 o-PHENYLENEDIAMINE ICSC: 1441 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: BROWN TO YELLOW CRYSTALS . TURNS DARK ON EXPOSURE TO LIGHT. PHYSICAL DANGERS: Dust explosion possible if in powder or granular form, mixed with air. CHEMICAL DANGERS: The substance decomposes on burning producing toxic fumes including nitrogen oxides . OCCUPATIONAL EXPOSURE LIMITS: TLV: 0.1 mg/m³; A3; (ACGIH 2002). MAK: Carcinogen category: 3B; sensitization of skin (Sh); (DFG 2002). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. INHALATION RISK: A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C ; on spraying or dispersing, however, much faster. EFFECTS OF SHORT-TERM EXPOSURE: The substance is irritating to the eyes and is mildly irritating to the skin and the respiratory tract . The substance may cause effects on the blood , resulting in the formation of methaemoglobin. The effects may be delayed. 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 blood , resulting in anaemia . This substance is possibly carcinogenic to humans. PHYSICAL PROPERTIES Boiling point: 256-258°C Melting point: 103-104°C Solubility in water, g/100 ml at 35°C: 0.4 Vapour pressure, kPa at 20°C: 0.0013 Relative vapour density (air = 1): 3.73 Flash point: 156°C c.c. Explosive limits, vol% in air: 1.5-? Octanol/water partition coefficient as log Pow: 0.15 (calculated) ENVIRONMENTAL DATA The substance is very toxic to aquatic organisms. Do not to let this chemical enter the environment. N O T E S Depending on the degree of exposure, periodic medical examination is suggested. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. Also consult ICSC 0805 p-Phenylenediamine and ICSC 1302 m-Phenylenediamine. NFPA Code: H; F1; R0; Transport Emergency Card: TEC (R)-61S1673-S ADDITIONAL INFORMATION ICSC: 1441 o-PHENYLENEDIAMINE (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.