International Chemical Safety Cards SODIUM AZIDE ICSC: 0950 Azide Azium NaN3 Molecular mass: 65.02 ICSC #    0950 CAS #     26628-22-8 RTECS # VY8050000 UN #        1687 EC #         011-004-00-7 April 07, 1997 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Decomposes on heating. NO contact with acids, heavy metals. Dry sand, special powder. EXPLOSION Risk of fire and explosion on contact with acids and many metals (lead, brass, copper, mercury, silver). Do NOT expose to friction or shock. In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE STRICT HYGIENE!  •INHALATION Cough. Headache. Shortness of breath. Unconsciousness. Nasal stuffiness. Blurred vision. Slowing heart beat. Fall in blood pressure. Local exhaust or breathing protection. Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.  •SKIN MAY BE ABSORBED! Redness. Blisters. Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •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 Abdominal pain. Nausea. Sweating. (Further see Inhalation). Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Rest. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Evacuate danger area! Consult an expert! Sweep spilled substance into plastic containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. (Extra personal protection: complete protective clothing including self-contained breathing apparatus). Fireproof. Separated from acids, food and feedstuffs, metals, especially lead and its compounds. Do not transport with food and feedstuffs. T+ symbol R: 28-32 S: 1/2-28-45 UN Hazard Class: 6.1 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 0950 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 SODIUM AZIDE ICSC: 0950 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: ODOURLESS COLOURLESS HEXAGONAL CRYSTALS. PHYSICAL DANGERS: CHEMICAL DANGERS: May explode on heating above melting point, especially on rapid heating , causing fire and explosion hazard. The solution in water is a weak base. Reacts with copper, lead, silver, mercury and carbon disulfide to form particularly shock-sensitive compounds. Reacts with acids, forming toxic and explosive hydrogen azide. OCCUPATIONAL EXPOSURE LIMITS: TLV (as ceiling values): as hydrazoic acid vapour 0.11 ppm; as sodium azide 0.29 mg/m3 (ACGIH 1996). OSHA PEL: none NIOSH REL: C 0.1 ppm (as HN3) skin C 0.3 mg/m3 (as NaN3) skin NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes, the skin and the respiratory tract. Exposure slightly above OEL could cause effects on the nervous system. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Decomposes below melting point at 275°C Relative density (water = 1): 1.8475 Solubility in water: good (41.7 g/100 ml at 17°C) ENVIRONMENTAL DATA N O T E S The occupational exposure limit value should not be exceeded during any part of the working exposure. Smite is a trade name. Transport Emergency Card: TEC (R)-61G12b ADDITIONAL INFORMATION ICSC: 0950 SODIUM AZIDE (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.