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Hazard Predictions

• Intense or explosive reaction: Reaction may be particularly intense, violent, or explosive

No evidence was found for hazardous interactions between alkali metals and carbonate salts at ambient conditions. Hazardous reactions do occur at elevated temperatures, however, which is important due to the widespread use of carbonates and bicarbonates as fire extinguishing agents. Carbonates and bicarbonates should never be used to extinguish metal fires.

Burning sodium-potassium alloy reacts violently with sodium bicarbonate (Hazardous Chemical Reactions, NFPA 491M, Quincy (MA), National Fire Protection Association, 10th ed., 1991).

Burning lithium reacts violently with sodium carbonate and sodium bicarbonate (Dickinson, F. 1961. Mellor's Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 2, Supplement 2, p. 25. Longmans, Green and Co Ltd.).

Above 700C, sodium carbonate and sodium metal react to form sodium carbide (Na2C2), which is itself a very strong base which can react with water to form flammable acetylene gas (Eggeman, T. and Updated by Staff 2007. Sodium and Sodium Alloys. Kirk-Othmer Encyclopedia of Chemical Technology. (Online)).