International Chemical Safety Cards 1,2-DIPHENYLHYDRAZINE ICSC: 0263 Hydrazobenzene Diphenylhydrazine N,N'-Bianiline C12H12N2 / C6H5NHNHC6H5 Molecular mass: 184.3 ICSC #    0263 CAS #     122-66-7 RTECS # MW2625000 EC #         007-021-00-4 April 21, 2005 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 See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE. AVOID ALL CONTACT!  •INHALATION Cough. Local exhaust or breathing protection. Fresh air, rest.  •SKIN Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •EYES Redness. Safety spectacles 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. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: P3 filter respirator for toxic particles. Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. Separated from food and feedstuffs. Store in an area without drain or sewer access. Do not transport with food and feedstuffs. Note: E T symbol N symbol R: 45-22-50/53 S: 53-45-60-61 SEE IMPORTANT INFORMATION ON BACK ICSC: 0263 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-DIPHENYLHYDRAZINE ICSC: 0263 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE TO YELLOW CRYSTALS PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on burning producing toxic fumes including nitrogen oxides. Reacts with mineral acids to produce benzidine (see ICSC 0224). OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK: Carcinogen category: 2; (DFG 2004). ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: May cause mechanical irritation. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: This substance is probably carcinogenic to humans. PHYSICAL PROPERTIES Melting point (decomposes): 125-131°C Density: 1.16 g/cm3 Solubility in water, g/100 ml at 20°C: <0.1 (poor) Octanol/water partition coefficient as log Pow: 2.94 ENVIRONMENTAL DATA The substance is very toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish. N O T E S Do NOT take working clothes home. Depending on the degree of exposure, periodic medical examination is suggested. ADDITIONAL INFORMATION ICSC: 0263 1,2-DIPHENYLHYDRAZINE (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.