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Hazard Predictions

• Explosive: Reaction products may be explosive or sensitive to shock or friction
• Flammable: Reaction products may be flammable
• Generates gas: Reaction liberates gaseous products and may cause pressurization
• Generates heat: Exothermic reaction at ambient temperatures (releases heat)
• Intense or explosive reaction: Reaction may be particularly intense, violent, or explosive

Hydrogen azide (HN3) forms explosive azide salts in contact with transition metals (Crowley, B.R. et al. 1973. Chemistry and Industry, p. 444; Urben, P.G. 1995. Bretherick's Handbook of Reactive Chemical Hazards, 5th Edition. Oxford: Butterworth-Heinemann. pp. 1499).

Iron catalyzes exothermic decomposition of azidoacetic acid at ambient temperatures; the reaction may accelerate to explosion at high temperatures (Borowski, S.J. 1976. Chemical and Engineering News 54(44):5; Lewis, R.J., Sr. 1992. Sax's Dangerous Properties of Industrial Materials, 8th Edition. New York: Van Nostrand Reinhold. pp. 321).

Lead azide forms explosive zinc or copper azide on prolonged contact with zinc or copper, respectively. The zinc or copper azides can sensitize the mixture and make it even more explosive, possibly leading to spontaneous explosion of the already sensitive azide (Federoff, B.T. 1960. Encyclopedia of Explosives and Related Compounds. Dover, NJ: Piccatinny Arsenal. Volume A, p. 532, 551; Lewis, R.J., Sr. 1992. Sax's Dangerous Properties of Industrial Materials, 8th Edition. New York: Van Nostrand Reinhold. pp. 2096; MCA Case History No. 2053, Case Histories of Accidents in the Chemical Industry, Washington, Manufacturing Chemists' Association).

Potential Gas Byproducts

• Nitrogen (N2)