Also Called: Silica, vitreous; Silica, amorphous [Silica, amorphous, precipitated and gel];Amorphous silica (silica gel, precipitated silica);Silica gel, pptd., cryst.-free;Siliciumdioxid;Silica gel;silicon oxide (including silica, silica gel);PRECIPITATED SILICA (SEE SILICA - AMORPHOUS);SILICA, AMORPHOUS, PRECIPITATED AND GEL;SILICA - PRECIPITATED SILICA;Synthetic amorphous silica, pptd.;SILICA GEL, PRECIPITATED, CRYSTAL-FREE;SILICA GEL, CRYST. -FREE;Silica gel, precipitated, crystalline free;PRECIPITATED SILICA AND SILICA GEL;silica, amorphous;Synthetic amorphous silica (silicon dioxide) is produced by a wet process by reacting an aqueous alkali metal silicate solution and a mineral acid. An extensive hydrated silica structure, or ''gel'' is formed which is then dried. A precipitated silica is also produced in a ''wet'' process in a finely-divided, hydrated form by precipitation from aqueous alkali metal silicate solutions. This product contains no detectable crystalline silica.;SILICA, AMORPHOUS, PRECIPITATE & GEL;Synthetic amorphous silicon dioxide (nano);Silica gel, precipitated;SILICA, PRECIPITATED;Silica gel, pptd., cryst.-free Synthetic amorphous silica (silicon dioxide) is produced by a wet process by reacting an aqueous alkali metal silicate solution and a mineral acid. An extensive hydrated silica structure, or ''gel'' is formed which is then dried. A precipitated silica is also produced in a ''wet'' process in a finely-divided, hydrated form by precipitation from aqueous alkali metal silicate solutions. This product contains no detectable crystalline silica.;SILICA - SILICA GEL
