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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

Magnesium reacts with ammonium salts, evolving flammable H2 gas and possibly toxic and flammable NH3 gas (Mellor, J.W. 1967. Mellor's Modern Inorganic Chemistry, 6th Edition. John Wiley & Sons, Inc. pp. 689).

Zinc can ignite in contact with ammonium salts, including ammonium chloride, if water is present (Sorbe, G., 1968, Giftige und Explosive Substanzen, Frankfurt, Umschau Verlag, pp. 158; Hanson, R.M. 1976. Journal of Chemical Education 53, p. 578).

Copper and lead salts (oxide, fluoride, chloride, and sulfide) form explosive mixtures with magnesium (Gorbunov, V.V. et al. 1986. Combustion, Explosives, and Shockwaves 22:726).

Zinc forms flammable mixtures with ZnCl2 (Bylo, Z. et al. 1983. Chemical Abstracts 98:146031).

Magnesium can reduce the halide salts of zirconium, titanium and uranium, producing magnesium halide salts and metallic zirconium, titanium or uranium, respectively (Kramer, D. A. 2010. Magnesium and Magnesium Alloys. Kirk-Othmer Encyclopedia of Chemical Technology. 1-55. (Online)).

Reaction between ammonium sulfide and zinc evolves toxic and flammable H2S gas and flammable H2 gas (Anon. 1960. Sichere Chemiearb. 12(4):29).

Potential Gas Byproducts

• Hydrogen (H2)
• Hydrogen Sulfide (H2S)
• Ammonia (NH3)