Precipitated silica

Chemical Formula

SiO₂·nH₂O

Molecular Weight

60.084 g/mol

Standard

HG/T 3061-2009

Appearance

White, highly dispersed amorphous powder or flocculent material

Melting Point

1750℃

Solubility

Insoluble in water and most acids; dissolves in caustic soda and hydrofluoric acid

Thermal Stability

Resistant to decomposition and combustion at high temperatures

Key Characteristics

Exhibits excellent electrical insulation, high water absorption, notable porosity, and overall stability. Acts as a reinforcement and thickening agent, with properties such as thixotropy, high purity, large specific surface area, strong adsorption, and superior dispersion.

Applications

Extensively utilized across industries such as plastics, rubber, paper, paint, dyes, cosmetics, and inks. Functions as a reinforcing agent for both natural and synthetic rubber, a filler in synthetic resins, a thickener for inks and paints, a matting agent in coatings, a friction agent in toothpaste, a filler in paper, and a dispersant in pesticides.