International Chemical Safety Cards 4-NITRO-o-PHENYLENEDIAMINE ICSC: 1543 4-Nitro-1,2-benzenediamine 1,2-Diamino-4-nitrobenzene 2-Amino-4-nitroaniline C6H7N3O2 / C6H3(NH2)2NO2 Molecular mass: 153.1 ICSC #    1543 CAS #     99-56-9 RTECS # ST2975000 October 27, 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. Water spray, powder. EXPLOSION EXPOSURE See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE. PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Local exhaust or breathing protection. Fresh air, rest.  •SKIN Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Safety goggles. 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. Rinse mouth. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: P2 filter respirator for harmful particles. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Separated from incompatible materials . See Chemical Dangers. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1543 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 4-NITRO-o-PHENYLENEDIAMINE ICSC: 1543 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: RED POWDER PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on burning producing toxic fumes including nitrogen oxides . Reacts with strong acids , strong oxidants and strong reducing agents . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: 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: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. PHYSICAL PROPERTIES Melting point: 201°C Solubility in water: poor Octanol/water partition coefficient as log Pow: 0.88 ENVIRONMENTAL DATA N O T E S The substance is combustible but no flash point is available in literature. Environmental effects from the substance have not been investigated. Do NOT take working clothes home. ADDITIONAL INFORMATION ICSC: 1543 4-NITRO-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.