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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)
• Toxic: Reaction products may be toxic

Urethane decomposes in hot aqueous acid, producing toxic ammonia gas and inert CO2 gas, in hot aqueous acid (Lewis, R.J., Sr. 1992. Sax's Dangerous Properties of Industrial Materials, 8th Edition. New York: Van Nostrand Reinhold. pp. 3472.).

Urea reacts with nitrous acid to liberate inert N2 and CO2 gases (Smith, P. A. S., Open-Chain Nitrogen Compounds, Vol. I. New York: W. A. Benjamin, Inc., 1965, pp. 272).

Urea is also hydrolyzed by other acids and bases (Rodd, E. H, Ed. Chemistry of Organic Compounds. New York: Elsevier Publishing Company, 1951. Vol. I pp. 908).

Oxidizing acids may react with carbamates to liberate toxic NOx gases (Predicted).

Potential Gas Byproducts

• Carbon Dioxide (CO2)
• Nitrogen (N2)
• Ammonia (NH3)
• Nitrogen Oxides (NOx)