Skip to main content
Home - Reade
Back to Inorganic
Back to Inorganic

Fumed Silica (SiO₂)

Fumed Silica, also known as pyrogenic silica, are powders that are available with either hydrophobic or hydrophilic surfaces. They are made with a flame, resulting in an extremely small particle with a three-dimensional structure with low bulk density and high surface area, making this powder useful as a thickener or reinforcing filler.
Typical Applications

Fumed silica powder is used in laminating and gel coat applications. It is also used in the food industry as a thickening and anticaking agent. It is also used as a desiccant in toothpaste (light abrasive) and cosmetics. Fumed silica also has applications as a filler in paints, printing inks, resins, and adhesives. Various other applications are rheological control, flow agent, thickening agent, reinforcing agent in: adhesives and/or sealants, silicone elastomer, rubber products, suspension, paints, dispersion

Packaging Options

Multi-ply paper bags, drums or super sacks


Fumed Silica TSCA (SARA Title III) Status: Listed- No
Carcinogenicity: Not listed as a carcinogen By IARC, NTP, Z list or OSHA
Fumed Silica (Specific) CAS Number: 112945-52-5
Fumed Silica (General) CAS Number:7631-86-9
Fumed Silica RTECS Number: VV310000

Add Fumed Silica (SiO₂) To Your Quote

Select Specifications Available

  • Hydrophilic (Untreated) Fumed Silica Powder
  • Hydrophobic (Treated) Fumed Silica Powder


  • Units
  • Pieces
  • Grams
  • Troy Ounces
  • Pounds
  • Kilograms
  • Metric Tons
  • Net Tons
  • Feet
  • Meters
  • Inches
  • Centimeters
  • Millimeters
Not seeing what you're looking for? Request Product

Thank you for adding a product to your quote request!

Submit a RFQ

Review & Submit

View other Products

View Products