Shandong Peak-tech New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of colloidal silicon dioxide in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to buy durable colloidal silicon dioxide for sale here from our factory.
Colloidal Silicon Dioxide Technical Profile
| Product Type | Chemical Name | CAS Number | Physical Form | SiO₂ Content | Particle Size | Dispersion Medium |
|---|---|---|---|---|---|---|
| Custom Colloidal Grade | Amorphous silicon dioxide | 7631-86-9 | Colloidal liquid dispersion | 20–40 wt% | 3–180 nm | Water |
The published values describe a customizable product family, not one universal grade. Confirm pH, stabilizer, particle-size method, purity limits and the complete target specification before sampling.
Specify the Correct Form of Silicon Dioxide
Non-Crystalline Structure
The dispersed particles are amorphous silicon dioxide rather than a crystalline silica grade.
Nanoparticles Dispersed in Water
The product is supplied as a stabilized liquid dispersion, not as dry precipitated or fumed silica powder.
Confirm Chemical Documentation
State the required certificate, safety-data and regulatory-document format for the destination market.
Define Stabilization and Purity
Specify pH, counter-ion, sodium limit, metal impurities and water-quality requirements.
Information Needed for Chemical-Grade Selection
"Colloidal silicon dioxide" defines the material class; commercial qualification requires measurable physical and chemical limits.
- Chemical form: confirm that an aqueous amorphous colloidal dispersion is required.
- Core parameters: provide SiO₂ content, particle size, pH, density and viscosity targets.
- Stabilization chemistry: specify acidic, alkaline, ammonium, potassium or another required system.
- Purity limits: state sodium, iron, aluminum and other relevant impurity thresholds.
- Documentation: list COA, SDS, regulatory declarations and destination-language requirements.
- Order details: provide trial quantity, annual demand, packaging and destination country.
Request a Colloidal SiO₂ Sample and Quote
Send the chemical specification, stabilization system, purity limits, trial quantity and annual demand.
Request a Grade RecommendationProtect Product Stability During Storage
Packaging Options
Available polyethylene packaging sizes are 25 kg, 250 kg and 1000 kg.
Storage Temperature
Store at 0–40°C and protect from freezing. Temperatures below 0°C can cause irreversible gelation.
Direct Sunlight
Avoid prolonged exposure to direct sunlight during storage and transportation.
Container Closure
Keep containers closed to limit water evaporation and precipitation of solid silica particles.
Colloidal Silicon Dioxide Purchasing Questions
What is colloidal silicon dioxide?
It is a stabilized liquid dispersion of amorphous SiO₂ nanoparticles, commonly known as colloidal silica or silica sol.
What CAS number is listed?
The published technical sheet lists CAS 7631-86-9 for silicon dioxide.
Is it the same as dry silica powder?
No. This product is supplied as a water-based colloidal dispersion rather than dry fumed or precipitated silica powder.
Which purity information should buyers provide?
Provide sodium, metal-ion and other trace-impurity limits together with the required test methods.
How should colloidal silicon dioxide be stored?
Store it at 0–40°C, prevent freezing and direct sunlight, and keep the container closed.
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Applications of Colloidal Silicon Dioxide
The appropriate grade depends on particle size, concentration, stabilization chemistry and impurity limits. Qualification should use the buyer's actual formulation and process.
Inorganic Binding
Evaluated as a water-based amorphous SiO₂ binder in compatible mineral and ceramic systems.
Functional Coatings
Selected grades can be assessed where colloidal SiO₂ contributes to hardness or surface modification.
Catalyst Carrier Systems
Controlled-purity grades may serve as silica sources or binders during carrier preparation.
Paper and Textile Treatment
Compatible grades can be evaluated in paper coatings, surface treatments and textile formulations.
Precision Surface Processing
Controlled particle-size dispersions may be qualified for compatible polishing and finishing processes.
Custom Chemical Formulations
Supports projects requiring defined amorphous SiO₂ content, particle size, pH and purity.
