
Levasil BF30 is an alkaline, aqueous dispersion of colloidal silica that is approximately 30% solids by weight. The silica dispersion is sodium stabilized and the amorphous silica particles carry a negative surface charge. The silica particles are discrete, have a smooth, spherical shape, and are present in a narrow particle size distribution. The particles have also been surface modified with aluminum. The physical appearance of the dispersion is an opalescent liquid, slightly more viscous than water. Levasil BF30 is produced for world-wide distribution.