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Hazard Predictions

• Flammable: Reaction products may be flammable
• Generates gas: Reaction liberates gaseous products and may cause pressurization
• Intense or explosive reaction: Reaction may be particularly intense, violent, or explosive
• Toxic: Reaction products may be toxic

The reaction of magnesium with HNO3 yields toxic NOx gases, and the reaction of magnesium with concentrated H2SO4 yields toxic SOx gases (Mellor, J.W. 1967. Mellor's Modern Inorganic Chemistry, 6th Edition. John Wiley & Sons, Inc. pp. 689).

Aluminum reacts with hot, concentrated H2SO4 with the evolution of toxic SO2 gas (Mellor, J.W. 1967. Mellor's Modern Inorganic Chemistry, 6th Edition. John Wiley & Sons, Inc. pp. 745).

Chromium reacts with H2SO4, yielding toxic SO2 gas (Mellor, J.W. 1967. Mellor's Modern Inorganic Chemistry, 6th Edition. John Wiley & Sons, Inc. pp. 866).

Iron reacts with H2SO4 to produce flammable H2 gas, and reacts with dilute HNO3 to produce toxic and flammable NH3 (Mellor, J.W. 1967. Mellor's Modern Inorganic Chemistry, 6th Edition. John Wiley & Sons, Inc. pp. 915).

Potential Gas Byproducts

• Hydrogen (H2)
• Nitrogen Oxides (NOx)
• Sulfur Dioxide (SO2)