International Chemical Safety Cards BENZOTRIAZOLE ICSC: 1091 1H-Benzotriazole 1,2,3-Triazaindene 1,2,3-Benzotriazole Azimidobenzene C6H5N3 Molecular mass: 119.1 ICSC #    1091 CAS #     95-14-7 RTECS # DM1225000 November 25, 1998 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Water spray. EXPLOSION Finely dispersed particles form explosive mixtures in air. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. 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 Redness. Pain. Safety spectacles. 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. 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: P1 filter respirator for inert particles). Well closed. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1091 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 BENZOTRIAZOLE ICSC: 1091 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE TO BROWN CRYSTALLINE POWDER PHYSICAL DANGERS: Dust explosion possible if in powder or granular form, mixed with air. CHEMICAL DANGERS: The substance decomposes on heating producing toxic fumes including aniline and nitrobenzene. The solution in water is a weak acid. May explode on vacuum distillation. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact may cause skin sensitization. PHYSICAL PROPERTIES Boiling point at 2 kPa: 204°C Sublimation point: 200°C Decomposes below boiling point at 260°C Melting point: 98.5°C Density: 1.36 g/cm3 Solubility in water, g/100 ml: 2 (moderate) Vapour pressure, Pa at 20°C: 5 Flash point: 190-195°C o.c. Auto-ignition temperature: 210°C ENVIRONMENTAL DATA The substance is harmful to aquatic organisms. N O T E S Health effects of exposure to the substance have not been investigated adequately. Cobratec #99, U-6233 are trade names. ADDITIONAL INFORMATION ICSC: 1091 BENZOTRIAZOLE (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.