Silica / Silicon Dioxide (Amorphous SiO2) CAS 7631-86-9; Precipitated Silica and Silica Gel Grades

Free samples available upon request

Description

Silica / Silicon Dioxide (Amorphous SiO₂) CAS 7631-86-9 includes precipitated silica and silica gel powder grades, both produced through wet-process routes. These materials are supplied as white, free-flowing amorphous powders with high purity and tunable physical properties.

• Precipitated Silica → manufactured by controlled precipitation from silicate solutions, producing powders with defined surface area, porosity, and particle size distribution.

• Silica Gel → formed via gelation and drying of silicate solutions, yielding highly porous powders with large surface area and strong adsorption capacity.

Both forms are widely applied in industries that require reinforcement, free-flow control, adsorption, thickening, and carrier properties.

Specifications

Specifications vary by grade. Typical parameters include:

• SiO₂ Content: ≥ 99%

• Surface Area (BET): 100–400 m²/g

• Particle Size: 2–20 μm

• Bulk Density: 100–300 g/L depending on grade

• pH (in suspension): 5-8

• Appearance: White, odorless, free-flowing amorphous powder

Key Features

• High-purity amorphous silica, non-crystalline and safe in use

• Precipitated Silica → versatile powder for reinforcement, carriers, and anti-caking

• Silica Gel → high porosity, excellent adsorption and surface activity

• Chemically stable, inert, and non-toxic

• Available in multiple grades tailored to industrial applications

Applications

Amorphous silica is one of the most versatile industrial additives, used across diverse markets:

• Rubber & Tire Industry → Precipitated silica reinforces tire treads, shoe soles, and silicone rubber, improving abrasion resistance, tear strength, rolling resistance, and fuel efficiency.

• Paints, Coatings & Inks → Fumed silica controls rheology, sag, and settling; precipitated silica improves matting, opacity, and durability. Widely applied in architectural, industrial, and wood coatings.

• Adhesives & Sealants → Fumed silica acts as a thixotropic agent for viscosity control; precipitated silica enhances mechanical strength. Used in silicone sealants, epoxy adhesives, and construction sealants.

• Plastics & Polymers → Improves reinforcement, dimensional stability, and surface properties in engineering plastics and thermosets.

• Food & Feed → Precipitated silica functions as an anti-caking agent and free-flow aid in powdered foods, spices, milk powder, and feed premixes. Also used as a carrier for vitamins, flavors, and active ingredients.

• Pharmaceuticals & Cosmetics → Excipient and glidant in tablets, flow aid in powders, oil absorption in cosmetics, and stabilizer in creams and emulsions.

• Catalysts & Chemicals → Silica gel and precipitated silica act as high-surface-area catalyst supports and filtration aids in petrochemicals, fine chemicals, and environmental applications.

• Electronics & Electrical → High-purity fumed silica is used in encapsulants, potting compounds, and insulating materials for semiconductors and cables.

• Desiccants & Drying → Silica gel powders applied in industrial drying, separation, and moisture control systems.

• Agriculture → Carrier for pesticides, fertilizers, and agrochemical formulations; flow aid in powders.

Packaging & Storage

• Powder grades (all types): 10kg/paper-plastic valve bag, kraft paper composite bag, or as required

• Store in a cool, dry, ventilated area, tightly sealed to prevent moisture uptake

We warmly welcome your visit to our factory — we look forward to meeting you in person and exploring opportunities together!