Levasil CA331 M 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 and have a spherical shape. The physical appearance of the dispersion is slightly more viscous than water. Levasil CA331 M is produced for world-wide distribution.