Safety and Precautions
A number of fatal industrial accidents produced by detonation and combustion of leaked silane in air have been reported. Diluted silane mixtures with inert gases such as nitrogen or argon are even more likely to ignite when leaked into open air, compared to pure silane: even a 1% mixture of silane in pure nitrogen easily ignites when exposed to air. Unlike methane, silane is fairly toxic: the lethal concentration in air for rats (LC50) is 0.96% (9600 ppm) over a 4-hour exposure. In addition, contact with eyes may form silicic acid with resultant irritation.
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