Fumed Silica
ELVISCTM – FuSi
Get Pricing for This Product
Need pricing? Request a quote for this product and we'll get back to you shortly.
Speed Up Your Sample Testing Process
Express Delivery in 24–48 Hours
Fumed Silica is a high-purity, amorphous silica powder known for its exceptional thickening, thixotropic, and anti-caking properties. It is widely used in various industries, including coatings,…
CAS Number
112945-52-5
HS Code
28112200
INCI Name
Fumed Silica
Molecular Formula
SiO2
Fumed Silica
ELVISCTM – FuSi
Fumed Silica is a high-purity, amorphous silica powder known for its exceptional thickening, thixotropic, and anti-caking properties. It is widely used in various industries, including coatings, adhesives, sealants, and cosmetics, to enhance viscosity, stability, and texture.
CAS Number
112945-52-5
INCI Name
Fumed Silica
HS Code
28112200
Molecular Formula
SiO2
Get Pricing for This Product
Need pricing? Request a quote for this product and we'll get back to you shortly.
Speed Up Your Sample Testing Process
We deliver domestic samples within 24 - 48 hours, helping you evaluate products and move to procurement without delays.
Product Specification
Physical Properties
| Property | Specification |
|---|---|
| Appearance | White, fluffy powder |
| Odor | Odorless |
| Molecular Weight | 60.08 g/mol |
| Density / Specific Gravity | 2.2 g/cm³ |
| Viscosity | Not applicable (used as a thickening agent) |
| Refractive Index | n20/D 1.46 |
| Ph (Aqueous Solution) | 3.7 - 4.5 (in 4% dispersion) |
| Assay / Purity | ≥ 99.8% SiO₂ |
Chemical Properties
| Property | Specification |
|---|---|
| Ionic Nature | Non-ionic, but surface silanol groups (Si-OH) can engage in hydrogen bonding. Standard fumed silica is acidic in nature. |
| Incompatibilities | Incompatible with fluorine, oxygen difluoride, chlorine trifluoride, strong acids, and strong bases. |
| Hazardous Reactions / Decomposition Products | The material is stable and not normally reactive. Hazardous decomposition products are not expected under normal conditions of use. Thermal decomposition may generate oxides of carbon. |
Thermal Properties
| Property | Specification |
|---|---|
| Melting Point | 1700 °C |
| Boiling Point | 2230 °C |
| Flash Point | Not applicable |
| Decomposition Temperature | > 400 °C |
| Thermal Stability | Stable under recommended storage and handling conditions. |
Processing Methods & Reference Formulations
A. High-Solids Anti-Corrosion Coating
A formulation designed for protective coatings with good sag resistance and pigment suspension.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Epoxy Resin | 50.0% |
| Polyamide Curing Agent | 25.0% |
| Titanium Dioxide | 15.0% |
| Talc | 7.5% |
| Fumed Silica | 1.5% |
| Xylene | 1.0% |
B. General Purpose RTV Silicone Sealant
A one-component, moisture-curing sealant for construction and general industrial use.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Polydimethylsiloxane (PDMS) Polymer | 75.0% |
| Plasticizer (e.g., Dimethylpolysiloxane) | 12.0% |
| Fumed Silica | 7.0% |
| Crosslinker (e.g., Methyltriacetoxysilane) | 5.0% |
| Adhesion Promoter | 1.0% |
Dosing Guidelines
A. Dosing by Application
| Application | Recommended / Max Dosage |
|---|---|
| Paints & Coatings | 0.5% - 5.0% |
| Adhesives & Sealants | 2.0% - 8.0% |
| Resins (Epoxy, Polyester) | 0.5% - 5.0% |
| Powder Coatings | 0.5% - 1.5% |
| Rubber (Silicone) | 5.0% - 30.0% |
About Fumed Silica
Fumed Silica, also known as pyrogenic silica, is a versatile material used across various industries for its unique properties. As a leading Fumed Silica manufacturer, we ensure high purity and consistent quality in our products. Fumed Silica is produced through the flame hydrolysis of silicon tetrachloride, resulting in a fine, amorphous powder with a high surface area. This makes it an excellent thickening and thixotropic agent, widely used in coatings, adhesives, and sealants to enhance viscosity and stability. In the cosmetics industry, Fumed Silica is valued for its ability to improve texture and prevent caking in powders. Our Fumed Silica suppliers focus on delivering products that meet the stringent demands of modern applications, ensuring performance and reliability. With a commitment to sustainability, we adopt eco-friendly practices in our production processes, aligning with the growing demand for sustainable raw materials. Whether used as a reinforcement in rubber or as a matting agent in coatings, Fumed Silica's versatility and effectiveness make it a preferred choice for manufacturers worldwide.
- High Surface Area: Provides excellent thickening and thixotropic properties, enhancing product performance.
- Function: Thickener, Thixotropic Agent, Anti-Caking Agent, Reinforcement, Matting Agent, Anti-Settling Agent, Flow Aid.
- Versatile Applications: Used in coatings, adhesives, sealants, and cosmetics for various functional benefits.
- Features: High surface area, low bulk density, high purity, and a three-dimensional chain-like particle structure. Technical grades can be hydrophilic (untreated) or hydrophobic (surface-treated).
- Eco-Friendly Production: Produced with a focus on sustainability and minimal environmental impact.
- Benefits: Provides highly effective viscosity control and thixotropy (shear-thinning). Prevents pigment and filler settling, improves sag resistance in coatings, enhances mechanical properties like tensile and tear strength in elastomers, and improves the flow and prevents clumping of powders.
- Consistent Quality: Ensures reliable performance across different applications and industries.
- Improved Stability: Enhances the stability and texture of formulations, preventing separation and settling.
About Fumed Silica
Fumed Silica, also known as pyrogenic silica, is a versatile material used across various industries for its unique properties. As a leading Fumed Silica manufacturer, we ensure high purity and consistent quality in our products. Fumed Silica is produced through the flame hydrolysis of silicon tetrachloride, resulting in a fine, amorphous powder with a high surface area. This makes it an excellent thickening and thixotropic agent, widely used in coatings, adhesives, and sealants to enhance viscosity and stability. In the cosmetics industry, Fumed Silica is valued for its ability to improve texture and prevent caking in powders. Our Fumed Silica suppliers focus on delivering products that meet the stringent demands of modern applications, ensuring performance and reliability. With a commitment to sustainability, we adopt eco-friendly practices in our production processes, aligning with the growing demand for sustainable raw materials. Whether used as a reinforcement in rubber or as a matting agent in coatings, Fumed Silica's versatility and effectiveness make it a preferred choice for manufacturers worldwide.
- High Surface Area: Provides excellent thickening and thixotropic properties, enhancing product performance.
- Function: Thickener, Thixotropic Agent, Anti-Caking Agent, Reinforcement, Matting Agent, Anti-Settling Agent, Flow Aid.
- Versatile Applications: Used in coatings, adhesives, sealants, and cosmetics for various functional benefits.
- Features: High surface area, low bulk density, high purity, and a three-dimensional chain-like particle structure. Technical grades can be hydrophilic (untreated) or hydrophobic (surface-treated).
- Eco-Friendly Production: Produced with a focus on sustainability and minimal environmental impact.
- Benefits: Provides highly effective viscosity control and thixotropy (shear-thinning). Prevents pigment and filler settling, improves sag resistance in coatings, enhances mechanical properties like tensile and tear strength in elastomers, and improves the flow and prevents clumping of powders.
- Consistent Quality: Ensures reliable performance across different applications and industries.
- Improved Stability: Enhances the stability and texture of formulations, preventing separation and settling.
Regulatory Compliance
| Region | Max Allowed Level | Notes | Certification Body |
|---|---|---|---|
| United States | 2% | Food: Listed as Generally Recognized as Safe (GRAS) for use as an anti-caking agent. Cosmetics: The Cosmetic Ingredient Review (CIR) Expert Panel concluded that amorphous silica is safe for use in cosmetics when formulated to be non-irritating. | TSCA: The substance is listed on the TSCA inventory. |
| European Union | - | Food: Approved as food additive E 551. Cosmetics: The Scientific Committee on Consumer Safety (SCCS) has not been able to draw a firm conclusion on the safety of nano-forms of silica due to data gaps. If considered a nanomaterial (insoluble with >50% of particles <100 nm), specific notification and safety assessment are required. | REACH: The substance is registered under REACH. |
| Canada | - | Not listed on the Cosmetic Ingredient Hotlist of prohibited or restricted substances. Listed on the Domestic Substances List (DSL). | - |
| Japan | - | Not listed on the List of Ingredients Prohibited in Cosmetic Products. Ingredients must comply with the Standards for Cosmetics. Listed on the ENCS inventory. | Marketing Authorization Holder (MAH) license required for import and sale. |
| Australia | - | Not considered to pose an unreasonable risk to health. Ingredients must be listed on the Australian Inventory of Industrial Chemicals (AIIC). | Importers/manufacturers must be registered with the Australian Industrial Chemicals Introduction Scheme (AICIS). |
| China | - | Listed on the Inventory of Existing Chemical Substances in China (IECSC). | - |
| Korea, Republic of | - | General cosmetics do not require pre-market registration but must comply with regulations. Listed on the Korean ECL inventory. | Importers must be registered as a "marketing authorization holder" (MAH). |
| ASEAN | - | Not found on the lists of prohibited or restricted substances in the Annexes of the ASEAN Cosmetic Directive (ACD). | Compliance with the ASEAN Cosmetic Directive. |
FAQs - Fumed Silica
Streamline
your chemical
procurement
Get fast responses from real experts