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Hazard Predictions

• 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
• Toxic: Reaction products may be toxic

NaN3 reacts violently with H2SO4 or HNO3 (Lewis, R.J., Sr. 1992. Sax's Dangerous Properties of Industrial Materials, 8th Edition. New York: Van Nostrand Reinhold. pp. 3064.), and the reaction evolves toxic and flammable HN3 at ambient temperature (Ross, F.F. 1964. Water and Waste Treatment 9:528; Urben, P.G. 1995. Bretherick's Handbook of Reactive Chemical Hazards, 5th Edition. Volume 2. Oxford: Butterworth-Heinemann. pp. 195.).

NaN3 will also react with a mixture of HNO3 and NaNO2, evolving a mixture of N2O and N2 gases (Jobelius, H., H. Hans-Dieter Scharff. 2002. Hydrazoic Acid and Azides. In Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH Verlag GmbH & Co. KgaA (Online)).

Hydrazine and its derivatives may undergo two different reactions with nitrous acid, yielding toxic NO2 and NH3 gases in one and HN3 gas in the other (Franklin, E. C. The Nitrogen System of Compounds. New York: Reinhold Publishing Corporation; 1935. pp. 301-303).

Diazomethane releases toxic NOx if mixed with acids (Lewis, R.J., Sr. 1992. Sax's Dangerous Properties of Industrial Materials, 8th Edition. New York: Van Nostrand Reinhold. pp. 1085.).

Potential Gas Byproducts

• Hydrazoic Acid (HN3)
• Nitrogen (N2)
• Ammonia (NH3)
• Nitrogen Oxides (NOx)