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Hazard Predictions

• Corrosive: Reaction products may be corrosive
• 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

Sodium hydride (in molten NaOH) reacts with metal oxides to form finely divided metals and sodium hydroxide. The metals may be highly reactive in this form (Pascal, P. 1966. Nouveau Trait茅 de Chimie Min茅rale. Vol. 2, Part 1, p. 220. Masson et Cie.; Sullivan, E. and Wade, R. 1980. Hydrides. Kirk-Othmer Encyclopedia of Chemical Technology, 3rd ed. John Wiley & Sons, Inc.).

Cesium acetylide incandesces on warming with iron (III) oxide (J. W. Mellor, 1946. Mellor's Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. 5, pp. 848. Longmans, Green and Co Ltd.).

Sodium borohydride reduces the metal cations of many metal salts. Some cations are reduced to the free metal, such as Ag, As, Sb, Bi, Pb, Hg, and the noble metals. These will be precipitated in a finely divided form, and may be especially reactive in that form. Additionally, hydrogen gas (H2) may be evolved during the reduction (Eggeman, T. 2001. Hydrides. In Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley & Sons, Inc. (Online)).

Sodium borohydride reacts with some metal cations (Ni, Co, and Cu), resulting in precipitation of a metal boride with evolution of hydrogen gas (H2) during the reaction (Eggeman, T. 2001. Hydrides. In Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley & Sons, Inc. (Online)).

Sodium borohydride reacts with the cations of some main group metals (B, Ge, Sn, As, Sb, and Bi) to form flammable gaseous hydrides, some of which are highly toxic (Eggeman, T. 2001. Hydrides. In Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley & Sons, Inc. (Online)).

Potential Gas Byproducts

• Germanes
• Hydrogen (H2)