Overview of Fumed Silica

Fumed silica, also known as pyrogenic silica, is an ultra-fine, high-purity amorphous silicon dioxide (SiO2) produced via the combustion of silicon tetrachloride in an oxygen-hydrogen flame. It appears as a fluffy white powder and is valued for its ability to thicken, stabilize, and reinforce materials.

Features of Fumed Silica

• High Surface Area: Typically ranges from 50 to 380 m²/g, providing excellent thickening and reinforcing properties.
• Hydrophilic or Hydrophobic Variants: Available in both forms depending on surface treatment, allowing for tailored applications.
• Excellent Thixotropy: Increases viscosity and improves flow properties of liquids and pastes.
• Chemical Inertness: Resistant to most chemicals, making it suitable for a wide range of industrial uses.

•  Enhances free-flowing properties and stability.

(Best Silica SiO2 Powder SSA 380 CAS No. 112945-52-5 Hydrophobic Fumed Silica)

Specification of Best Silica SiO2 Powder SSA 380 CAS No. 112945-52-5 Hydrophobic Fumed Silica

The Most Effective Silica SiO2 Powder (SSA 380, CAS No. 112945-52-5) is a premium hydrophobic fumed silica engineered for superior efficiency popular industrial and commercial applications. This ultra-fine, amorphous powder is generated through high-temperature hydrolysis of silicon tetrachloride, causing a highly porous nanostructure with a particular surface area (SSA) of 380 m ²/ g. Its hydrophobic nature is accomplished through surface therapy with organosilanes, ensuring outstanding water repellency and compatibility with non-polar systems.

Secret Specifications: .
– Chemical Solution: SiO2.
– Look: White, free-flowing powder.
– Fragment Size: Key particles vary in between 7– 40 nm, creating accumulations of 150– 300 nm.
– Bulk Density: 30– 60 g/L (untapped).
– pH (4% in water): 3.6– 5.5.
– Loss on Drying (105 ° C, 2 humans resources): ≤ 1.5%.
– Surface area Treatment: Dimethylsilyl or trimethylsilyl groups for hydrophobicity.

Qualities & Benefits: .
The material succeeds as a rheology modifier, presenting thixotropic habits to layers, adhesives, and sealers. Its hydrophobic properties protect against clumping in humid environments, boosting shelf stability. The high surface makes sure efficient support in composites, improving mechanical strength and abrasion resistance. It likewise acts as an anti-settling agent, maintaining suspensions in paints and materials.

Applications: .
Ideal for silicone rubber, epoxy systems, and polyurethane finishes to control thickness and droop resistance. Used in cosmetics (e.g., structures, sunscreens) for smooth structure and oil absorption. In pharmaceuticals, it improves powder circulation and tablet computer compaction. Ideal for printing inks, greases, and ceramic composites.

Security & Handling: .
Safe however requires precautions to prevent dust inhalation. Use PPE (handwear covers, masks) during handling. Shop in a dry, ventilated location away from dampness.

Compliance: .
Satisfies REACH, RoHS, and FDA (indirect food call) criteria.

This hydrophobic fumed silica provides unmatched flexibility, integrating chemical inertness, thermal security, and convenience of dispersion for enhanced product performance across industries.

(Best Silica SiO2 Powder SSA 380 CAS No. 112945-52-5 Hydrophobic Fumed Silica)

Applications of Best Silica SiO2 Powder SSA 380 CAS No. 112945-52-5 Hydrophobic Fumed Silica

Hydrophobic Fumed Silica (CAS No. 112945-52-5) with a specific area (SSA) of 380 m ²/ g is a high-performance additive widely made use of throughout sectors due to its one-of-a-kind combination of hydrophobicity, chemical inertness, and reinforcing residential properties. This ultra-fine, amorphous silica powder is produced through fire hydrolysis, resulting in a nanostructured material with a three-dimensional network of aggregated bits. Its surface area is treated with silanes to push back water, making it optimal for applications calling for wetness resistance, improved flowability, and improved mechanical security.

In layers and paints, hydrophobic fumed silica acts as a rheology modifier, protecting against sagging or clearing up in vertical applications while making certain even pigment circulation. It improves scrape resistance and longevity in vehicle and industrial layers. For adhesives and sealers, it improves thixotropy, reduces dripping, and increases bond toughness, even in moist atmospheres. The product’s reduced moisture absorption guarantees lasting security in silicone-based formulas.

In cosmetics and personal treatment, it serves as a thickening representative in creams, sun blocks, and structures, offering a smooth, non-greasy texture. Its oil-absorbing properties make it perfect for mattifying items. Pharmaceutical applications leverage its anti-caking and flow-enhancing capabilities in powder solutions, guaranteeing regular dosing.

The plastics and composites sector take advantage of its ability to improve mechanical stamina, thermal stability, and dimensional accuracy in polymers like PVC, epoxy, and silicone. It also enhances the dielectric buildings of electronic encapsulants. In inks and toners, it stops pile, making sure sharp prints and secure thickness.

Hydrophobic fumed silica is also vital in building materials, such as concrete and cements, where it reduces water penetration and improves crack resistance. Its compatibility with solvents and resins makes it a versatile additive for specialized chemicals. With its high purity and customizable surface treatment, this silica powder fulfills rigid regulatory standards for food-contact products and clinical devices.

Overall, SSA 380 Hydrophobic Fumed Silica provides unequaled efficiency in boosting product resilience, processability, and functionality across varied markets, making it a cornerstone product for advanced design and production.

Company Introduction

Welcome to HiphopGalaxy, a trusted global supplier of high-quality silicon dioxide (SiO2) powder, renowned for its exceptional purity and performance. Established with a vision to deliver cutting-edge materials that meet the diverse needs of modern industries, we have positioned ourselves as a leading player in the international market.

Our SiO2 powders find applications across multiple sectors, including adhesives, coatings, pharmaceuticals, cosmetics, polymers, and electronics. Each application benefits from the unique properties of our products—high surface area, excellent thixotropy, chemical inertness, and superior reinforcement capabilities. Whether you need hydrophilic or hydrophobic variants, we offer tailored solutions to meet your specific requirements.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of Best Silica SiO2 Powder SSA 380 CAS No. 112945-52-5 Hydrophobic Fumed Silica

What is hydrophobic fumed silica? Hydrophobic fumed silica (CAS No. 112945-52-5) is a high-purity silicon dioxide powder treated to repel water. Produced via flame hydrolysis, it has a specific surface area (SSA) of 380 m²/g, offering low moisture absorption, high dispersibility, and stability in non-polar systems. Its surface modification with siloxane/silane groups ensures compatibility with organic matrices.

What are its primary applications? This silica is widely used in coatings, adhesives, sealants, and inks to improve viscosity, thixotropy, and reinforcement. It prevents settling in paints, enhances durability in silicone rubber, and acts as a flow agent in powders. It’s also used in cosmetics for texture enhancement and in pharmaceuticals as an anti-caking agent.

How does it differ from hydrophilic silica? Unlike hydrophilic variants, hydrophobic fumed silica resists water absorption, ensuring stability in humid conditions. This makes it ideal for moisture-sensitive applications like waterproof coatings or non-polar polymer systems. Its surface treatment reduces agglomeration, improving dispersion in organic solvents without clumping.

How should it be stored and handled? Store in airtight containers in a cool, dry place away from moisture. Use PPE (gloves, masks) to avoid inhalation during handling. Ensure proper ventilation to minimize dust exposure. Avoid contact with strong acids or bases to preserve its hydrophobic properties.

Is it safe for industrial use? Yes, when handled correctly. It is chemically inert and meets OSHA safety standards. Prolonged inhalation of dust may cause respiratory irritation, so use protective gear. Refer to the Safety Data Sheet (SDS) for detailed guidelines on disposal, exposure limits, and emergency measures. Regulatory compliance (REACH, FDA) varies by application—verify suitability for your use case.

(Best Silica SiO2 Powder SSA 380 CAS No. 112945-52-5 Hydrophobic Fumed Silica)