aSuprtech specialty chemicals · Colloidal silica
Aqueous colloidal silica for catalysts, coatings and pigments. Tell us the particle size, solids, pH and impurity limits you need. We match the grade you use today or tailor a new one, and send you a free sample to test.
Particle size map
Average particle size by dynamic light scattering. If your target falls between grades, we produce to that size.
Product line · Colloidal silica
Ultra-high purity
Monodisperse spherical particles with sodium below 3 ppm and other trace metals below ICP-MS detection. For high-end catalysts, anti-reflective coatings and electronic materials.
High purity
Potassium-stabilized grades at about 40% solids with low trace metals. For precision polishing, silica-supported catalysts and optical coatings.
Standard
Sodium, ammonium, acidic, neutral, alumina-modified and silane-modified, from 5 to 110 nm. For catalyst binders, coatings, pigments, refractories and paper.
| Grade | Family | Particle size | SiO₂ | pH | Stabilizer | Typical use |
|---|---|---|---|---|---|---|
| CS-UP 70N | Ultra-high purity | 72 nm | 20% | ≈7 | None (near neutral) | AR coatings, high-purity catalysts, electronics |
| CS-UP 135K | Ultra-high purity | 137 nm | 40% | ≈10 | Potassium | Large-particle polishing, wafer and substrate stock removal |
| CS-HP 27K | High purity | 27 nm | ≈40% | alkaline | Potassium | Glass, sapphire and optical polishing |
| CS-HP 41K | High purity | 41 nm | ≈40% | alkaline | Potassium | Precision polishing, silica supports |
| CS-HP 74K | High purity | 74 nm | ≈40% | alkaline | Potassium | Sapphire and hard-disk substrate polishing |
| CS-CAT series | Standard | 5–110 nm | to 40% | 2–10 | Ammonium, acidic, neutral | Zeolite and molecular-sieve binders, washcoats |
| CS-COAT series | Standard | 5–110 nm | to 40% | 2–11 | Silane-modified, acidic, neutral, alumina-modified, sodium | Wood and clear coats, sol-gel, inorganic and heat-resistant coatings |
Typical values from production batches. Full TDS, SDS, COA and ICP-MS trace-metal data are available on request.
Applications
Key specs: Na content, particle size, binding strength
Key specs: resin compatibility, clarity, pH, surface modification
Key specs: particle size, charge (anionic or cationic), purity
Key specs: solids, stability, cost per kg of SiO₂
Custom grades
Most customers start by sending the grade they use today. We match it, or adjust particle size, solids, pH, stabilizer and impurity limits to fit your process.
Application, current grade if any, and the parameters that matter to you.
We confirm whether an existing grade fits or a tailored grade is needed, with a sample date.
Each sample ships with a COA and particle-size report. SEM images on request.
We adjust from your test results, then fix the grade in a written specification for every batch.
Quality
Storage
Store between 5 and 35 °C. Frozen colloidal silica gels irreversibly, so we plan winter shipments to avoid low temperatures.
About aSuprtech
aSuprtech is the specialty chemicals brand of aSupr. Our products are produced by qualified manufacturing partners in China under our specifications and quality control. We manage formulation, documentation and technical support, so you deal with one supplier from first sample to repeat orders. Colloidal silica is our first product line.
Request a sample
A short answer is enough to start. Samples and technical data are free.