International Chemical Safety Cards N,N'-DIPHENYL-para-PHENYLENEDIAMINE ICSC: 1181 N,N-Diphenyl-1,4-benzenediamine 1,4-bis(Phenylamino)benzene 1,4-Dianilinobenzene C6H5NHC6H4NHC6H5 / C18H16N2 Molecular mass: 260.3 ICSC #    1181 CAS #     74-31-7 RTECS # ST2275000 EC #         612-132-00-1 October 23, 1995 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 EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Local exhaust. Fresh air, rest.  •SKIN Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Face shield. 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. Give plenty of water to drink. 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. Separated from strong oxidants. Keep in a well-ventilated room. Xi symbol R: 43-52/53 S: 2-24-37-61 SEE IMPORTANT INFORMATION ON BACK ICSC: 1181 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 N,N'-DIPHENYL-para-PHENYLENEDIAMINE ICSC: 1181 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS CRYSTALS OR GREY POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing toxic fumes including nitrogen oxides . Reacts with oxidants . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. INHALATION RISK: Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. PHYSICAL PROPERTIES Boiling point at 0.066 kPa: 220-225°C Melting point: 150-151°C Relative density (water = 1): 1.2 Solubility in water: none Relative vapour density (air = 1): 9.0 ENVIRONMENTAL DATA N O T E S Commercial grades of the compound are greenish-brown. Agerite, Altofane-Dif, Diafen FF, Flexamine G and Permanax 18 are trade names. Card has been partly updated in April 2005. See section EU classification. ADDITIONAL INFORMATION ICSC: 1181 N,N'-DIPHENYL-para-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.