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Hazard Predictions

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

No evidence was found for a hazardous reaction between siloxanes and active metals under ambient conditions. However, serious reactions can occur if these materials are heated together or subjected to a spark. Examples are shown below:

Burning magnesium reacts with glass powder and sand, so these substances cannot be used to extinguish magnesium fires (Lawrence, K.D. et al., Chem. Abs., 1979, 91, p. 41576).

The mixture of aluminum or magnesium powder with silica can undergo a thermite reaction (very high energy reaction producing heat and sparks) if ignited (M. B. Ismailov, et al., Fizika Goreniya i Vzryva, 1992, 28(1), p. 46; W. D. Barker, School Sci. Rev., 1938, 20(77), p. 150).

Molten aluminum leaches the silicon out of ordinary glass (silicon dioxide). A mixture of silicon and aluminum is formed, along with alkaline aluminum oxides (Pascal, P. 1961. Nouveau Trait茅 de Chimie Min茅rale. Vol. 6, p. 504. Masson et Cie.).