Al2Chem AL FS-900 Fumed Silica

1 of 7 products in this brand
Al2Chem AL FS-900 Fumed Silica Fumed Silica is a hydrophilic fumed silica treated with dimethyldichlorosilane (DMDS) to create a hydrophobic surface. This high-purity, amorphous, colloidal silica in fluffy white powder form features nano-sized primary particles. It provides benefits such as thickening, reinforcement, free-flow enhancement, and anti-settling, along with added water repellency, corrosion resistance, and thickening of complex liquid systems.

Chemical Family: Silica

Labeling Claims: Not Listed In California Proposition 65

Compatible Polymers & Resins: Polyesters

Physical Form: Powder

Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Compatible Polymers & Resins
Adhesive & Sealant End Applications
Coating End Applications
Application Information
  • Adhesives and sealants – thickening and reinforcement
  • Improves shelf-life of silicone sealants
  • Unsaturated polyester resin and gel-coat thickening
  • Rheology control in paints, coatings and inks
  • Anti-settling for heavy fillers and pigment stabilization

Properties

Color (Properties)
Physical Form
Appearance
Fluffy white powder
Physical Properties
ValueUnitsTest Method / Conditions
pH Value (5% in water)4.0 - 5.0--
Loss on Ignition (at 1000°C for 2hr)max. 0.01%-
Heating Loss (at 105°C for 2 hr)max. 1.5%-
Bulk Density40 - 60g/l-
Average Particle Size16nm-
Bet Specific Surface Area90 - 130m²/g-
Carbon Content0.6 - 1.2wt%-
Silica Content (SiO₂)min. 99.8%-
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
AppearanceWhite powder--
Boiling Point2230°C-
Bulk Density30 - 150kg/m³-
Insoluble inWater--
Melting Point1700°C-
pH Value4.0 - 5.0--
Specific Gravity (at 20°C)2g/cc-

Regulatory & Compliance

Packaging & Availability

Packaging Information
  • Available in 10 kg bags (10 lb and bulk bags upon special request)