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Hazard Predictions

• Explosive: Reaction products may be explosive or sensitive to shock or friction
• Generates heat: Exothermic reaction at ambient temperatures (releases heat)

Sulfites are weak reducing agents and may form explosive mixtures when mixed with strong oxidizers such as inorganic nitrates (Predicted). Explosion may be initiated by heat, shock, or friction. Caution should be used before proceeding. Further research of comparable examples in the literature or very small scale, carefully controlled experiments may be needed to fully assess compatibility.

In general, nitrate and nitrite salts with redox active cations are more reactive with organic materials and reducing agents at ambient conditions. Redox active cations are transition metals and the metals in group 3a, 4a, and 5a of the periodic table and also include the ammonium cation NH4+. In general, nitrate and nitrite salts with non-redox active cations (also called spectator cations) are less reactive at ambient conditions. These include the alkali metals and alkaline earth salts. Caution should be used before proceeding. Further research of comparable examples in the literature or very small scale, carefully controlled experiments may be needed to fully assess compatibility.