Silicon dioxide. Medical search
Silicon Dioxide. Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid. Silicon. A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE.
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