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Hazard Predictions

• Potentially hazardous: May be hazardous but unknown

When combined, strong oxidizers and nitrides, phosphides, carbides, and silicides may react with intensity, as shown in the examples below. However, no specific evidence was found for a hazardous reaction between weak oxidizers and nitrides, phosphides, carbides, or silicides. Because of the nature of the members of the Weak Oxidizing Agents group we would not expect reaction kinetics to yield hazardous conditions. We urge chemists to perform testing to ensure that hazards do not occur under conditions appropriate to the scenario.

Calcium phosphide explodes on contact with Cl2O (Mellor, J.W. 1941. Mellor's Comprehensive Treatise on Inorganic and Theoretical Chemistry. Longmans, Green and Co Ltd. Volume 2. pp. 241-242; 1946. Volume 5. pp. 824).

Calcium carbide explodes violently if mixed with calcium hypochlorite and water (Urben, P.G. 1995. Bretherick's Handbook of Reactive Chemical Hazards, 5th Edition. Oxford: Butterworth-Heinemann. pp. 1211).

CaC2 reacts explosively with perchloryl fluoride at elevated temperatures (Kirk-Othmer Encyclopedia of Chemical Technology, London, Wiley-Interscience, 2nd Edition, 1966, Volume 9. pp. 602).