It does, however, have a tendency to bio-accumulate in tissues that contain silica.

The test paper for narcotics is based on a wood pulp composition containing silica.

An oil based defoamer also contains a wax and/or hydrophobic silica to boost the performance.

Peridotite is ultramafic, as the rock contains less than 45% silica.

The most common are those containing reactive silica, that can react with the alkalis in concrete.

Tianeptine tablets contain silica and do not dissolve completely.

The dark glass contains less silica and more magnesium and iron than the light green glass.

The diatomaceous earth contains silica because it is made from ground-up diatoms.

Within weeks of seeding, the old bush died and left behind stalks that contained too much silica to burn or to break or cut.

This creates a hazard for people exposed to products that contain powdered crystalline silica.