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Hazard Predictions

• Flammable: Reaction products may be flammable
• Generates gas: Reaction liberates gaseous products and may cause pressurization
• Toxic: Reaction products may be toxic

The combination of weak acids with nitrides, phosphides, carbides, and silicides will generate flammable and toxic products, such as the gases ammonia, phosphine, methane, and silane. 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. The generation of gases may be rather slow, however confinement may lead to dangerous conditions.

The nitrides of group 1 and 2 metals and aluminum react with hydrogen ions to form ammonia (Ettmayer, P. and Lengauer, W. 2000. Nitrides. Ullmann's Encyclopedia of Industrial Chemistry. (Online)).

Potential Gas Byproducts

• Hydrocarbons
• Ammonia (NH3)
• Phosphine (PH3)
• Silanes