| Customization: | Available |
|---|---|
| CAS No.: | 7631-86-9 |
| Formula: | Sio2 |
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Fumed silica (also known as pyrogenic silica) is a cutting-edge ultra-fine inorganic nanomaterial produced through high-temperature vapor-phase hydrolysis. With its nanoscale particle size (7-40 nm), exceptionally high surface area (50-400 m²/g), and superior chemical purity (≥99.8%), it delivers unmatched performance in reinforcement, thickening, and rheology control.
This advanced material is non-toxic, odorless, and pollution-free, making it ideal for high-end applications in rubber, coatings, electronics, cosmetics, pharmaceuticals, and more. Its unique properties-including thermal stability, dispersibility, and surface activity-make it an irreplaceable additive across multiple industries.
| Property | Specification | Test Method | Grade Variations |
|---|---|---|---|
| SiO2 Purity (%) | ≥99.8 | ISO 3262 | Electronic Grade: ≥99.9% |
| Primary Particle Size | 7-40 nm | TEM | Ultra-Fine: 5-15 nm (CMP Slurries) |
| BET Surface Area (m²/g) | 50-400 | ISO 9277 | High-SSA: 300-400 (Silicone Rubber) |
| Tapped Density (g/L) | 30-100 | ISO 787-11 | Low-Density: <50 (Aerogels) |
| pH (4% Dispersion) | 3.6-4.5 | ISO 787-9 | Neutralized: 6.0-7.0 (Pharma) |
| Loss on Ignition (%, 950°C) | ≤1.0 (Hydrophilic) | ISO 3262-20 | Hydrophobic: ≤2.5% |
| Carbon Content (Hydrophobic, %) | 0.5-5.0 | ASTM D1993 | High-Modification: 5-10% (Silylated) |
| Oil Absorption (g/100g) | 150-350 | ASTM D2414 | Low-Oil: 100-150 (Coatings) |
Mechanical Boost: Increases tensile strength (up to 12 MPa) and tear resistance (ASTM D624) in HTV/LSR grades.
Transparency: Maintains >90% light transmission (critical for LED encapsulation).
Thixotropy Control: Enables sag resistance at 500+ μm film thickness (ASTM D4402).
UV Stability: Prevents settling in automotive clear coats (QUV-A tested).
Viscosity Modifier: Provides shear-thinning in sunscreens (ISO 22716 compliant).
Free-Flow Agent: Anti-caking in powdered APIs (USP <476>).
About Us
At Jingdezhen Shengtian Tuyuan Trading Co., Ltd, we stand at the forefront of chemical trading, equipped with state-of-the-art production facilities. Our expertise spans industrial, agricultural, and food-grade chemicals, each reflecting our unwavering commitment to unparalleled quality. Our team, comprising over 100 seasoned professionals, holds ISO 9001, 14001, and 45001 certifications alongside CE marks, ensuring our steadfast compliance with global standards. This dedication cements our status as a trusted partner on the international stage.
Our Strengths
Quality & Competitive Pricing - Bolstered by a robust factory-backed supply chain, we guarantee stringent quality control coupled with cost-effective solutions.
Diverse Product Range - Our offerings include pioneering industrial chemicals, cutting-edge agricultural solutions, and top-tier food-grade ingredients, designed to cater to diverse needs.
Certified Excellence - Our triple ISO certifications and CE marks are a testament to our unwavering commitment to safety, reliability, and adherence to regulatory standards, reinforcing our promise of excellence.
Q1: Are you a manufacturer or a trader?
We are an integrated industrial and trading company.
Q2: Do you have a stable production facility?
Yes, we operate a 2,000+ sqm factory, ensuring stable supply and consistent quality.
Q3: Where do you ship from, and how long is the lead time?
We ship from Tianjin Port, China. Lead time is 7-15 days after deposit (sample orders: 3-5 days).
Q4: Do you offer free samples?
Yes! Samples are free, but freight is paid by the buyer. Custom formulations require a small fee.
Q5: Do prices drop for bulk orders?
Yes! Prices are negotiable based on volume. Contact us for the lowest quote (raw material prices fluctuate, so we adjust accordingly).
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