International Chemical Safety Cards 4-DIMETHYLAMINOAZOBENZENE ICSC: 1498 N,N-Dimethyl-4-phenylazobenzenamine p-Dimethylaminoazobenzene N,N-Dimethyl-p-(phenylazo)aniline C14H15N3 / C6H5N=NC6H4N(CH3)2 Molecular mass: 225.3 ICSC #    1498 CAS #     60-11-7 RTECS # BX7350000 UN #        3143 October 20, 2005 Validated TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. In case of fire in the surroundings: use appropriate extinguishing media. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!  •INHALATION Cough. Sore throat. Ventilation, local exhaust, or breathing protection. Fresh air, rest.  •SKIN Redness. Pain. 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 Do not eat, drink, or smoke during work. Wash hands before eating. Give plenty of water to drink. 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. UN Hazard Class: 6.1 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 1498 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-DIMETHYLAMINOAZOBENZENE ICSC: 1498 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: YELLOW CRYSTALS PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing nitrogen oxides . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. OSHA PEL: 1910.1015 See Appendix B NIOSH REL: Ca See Appendix A NIOSH IDLH: Ca N.D. See: IDLH INDEX ROUTES OF EXPOSURE: The substance can be absorbed into the body by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: The substance is irritating to the eyes , the skin and the respiratory tract . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. This substance is possibly carcinogenic to humans. PHYSICAL PROPERTIES Decomposes below boiling point Melting point: 114-117 °C Solubility in water: none Octanol/water partition coefficient as log Pow: 4.58 ENVIRONMENTAL DATA N O T E S Environmental effects from the substance have not been investigated adequately. C.I. 11020, Fast yellow and Solvent yellow 2 are commonly used names. Transport Emergency Card: TEC (R)-61GT2-III ADDITIONAL INFORMATION ICSC: 1498 4-DIMETHYLAMINOAZOBENZENE (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.