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HS Code |
874570 |
| Product Name | Hydrophilic Fumed Silica |
| Appearance | White, fluffy powder |
| Particle Size | 5-50 nanometers |
| Surface Area | 150-400 m²/g |
| Ph In Water | 3.7-4.5 |
| Density | Approx. 2.2 g/cm³ |
| Loss On Drying | <1.5% at 105°C |
| Silicon Dioxide Content | >99.8% |
| Refractive Index | 1.46 |
| Solubility In Water | Insoluble |
| Melting Point | >1700°C |
| Specific Gravity | 2.2 |
| Oil Absorption | 300-400 g/100g |
| Bulk Density | 30-50 g/L |
| Cas Number | 112945-52-5 |
As an accredited Hydrophilic Fumed Silica factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Hydrophilic Fumed Silica is packaged in a 10 kg double-layer kraft paper bag with a polyethylene liner, ensuring moisture protection. |
| Container Loading (20′ FCL) | Hydrophilic Fumed Silica is loaded in 10kg bags, 1000kg per pallet, totaling about 7–8 tons per 20′ FCL container. |
| Shipping | **Hydrophilic Fumed Silica** should be shipped in tightly sealed, moisture-proof containers to prevent contamination and moisture absorption. Transport in a cool, dry location, avoiding contact with incompatible substances. Label packages according to local regulations. Handle with care to prevent dust generation, and provide safety data sheets (SDS) with the shipment. |
| Storage | Hydrophilic fumed silica should be stored in tightly closed containers in a cool, dry, and well-ventilated area. Protect from moisture, direct sunlight, and sources of ignition. Avoid contact with incompatible substances such as strong acids or bases. Ensure containers are clearly labeled, and implement measures to prevent dust formation and accumulation, using appropriate personal protective equipment during handling and storage. |
| Shelf Life | Hydrophilic fumed silica typically has a shelf life of 2 years when stored in original, sealed containers, in cool, dry conditions. |
Applications of Hydrophilic Fumed Silica in Industrial ManufacturingHydrophilic fumed silica serves as a critical additive across multiple industries by enhancing viscosity, stability, rheology, and surface properties in diverse systems. As a primary manufacturer, we ensure quality consistency for demanding downstream integration and regulatory compliance. Below we detail key industrial application areas with their current compliance landscape, dosage recommendations, process integration, and final product outputs. 1. Silicone Sealants and AdhesivesIn silicone-based sealants and adhesives, hydrophilic fumed silica acts as a thixotropic agent and anti-sagging additive. It supports precise control of flow characteristics and standing strength, especially for construction, electronics, and automotive formulations. The material must meet high purity and low carbon content standards to prevent catalysis interference and ensure long-term sealant performance. Formulators rely on accurate dosages for maintaining workable viscosity, extrusion, and curing parameters. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
2. Paints, Coatings, and InksManufacturers in coatings, paint, and ink sectors use hydrophilic fumed silica as a rheology modifier and anti-settling aid, enhancing resistance to pigment sedimentation, improving texture, and reducing dripping or flow marks. Demanding end uses, such as automotive refinish coatings or coil coatings, require consistent particle size and minimal contamination. Product quality must fit label declaration and safety data sheet requirements as per market region. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
3. Pharmaceuticals and ExcipientsIn pharmaceutical manufacturing, hydrophilic fumed silica serves as a glidant, adsorbent, and thickening agent for tablets, topical creams, and suspensions. Its exceptional purity, low heavy metal content, and controlled BET surface area are crucial for compliance with pharmacopeia requirements. Manufacturers must validate raw material traceability, residual solvent risk, and microbial contamination parameters to support regulatory filings and release testing for global markets. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
4. Food and Beverage AdditivesWithin the food industry, hydrophilic fumed silica acts as an anti-caking and free-flow agent for powdered ingredients, spices, beverage mixes, and creamer powders. Its inertness and high surface area minimize clumping while helping achieve uniform texture and controlled pourability. Strict food-grade certifications and contaminant testing are enforced by authorities and third-party auditors for direct food contact. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
5. Unsaturated Polyester Resins and GelcoatsHydrophilic fumed silica provides thixotropy and anti-sagging behavior in unsaturated polyester resin (UPR) systems used for gelcoats, laminating resins, and high-load fillers for composite fabrication. The additive enhances mechanical strength and surface finish by ensuring stability of fillers and working viscosity. Downstream processors prioritize compatibility with initiators and pigments while maintaining air release and wetting characteristics during mold filling and curing. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
6. Industrial Rubber CompoundingIn rubber compounding for automotive, cable, and gasket production, hydrophilic fumed silica offers reinforcement and improves tear strength, resilience, and surface smoothness. Manufacturers depend on precise surface chemistry and controlled moisture to avoid scorch and achieve target cure kinetics. Application often combines with conventional fillers or works as a standalone micro-filler in specialty elastomer compounds requiring high electrical insulation or chemical resistance. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
7. Agricultural Pesticide FormulationsHydrophilic fumed silica helps improve flowability and dispersion in solid and liquid pesticide formulations, enhancing physical stability and preventing clumping of active ingredients. Compliance with agrochemical safety and residue tolerances requires certified purity, and traceability back to original batch. The raw material must suit both granule and suspension concentrate (SC) formulation technologies, with dispersibility being key for field application uniformity. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
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Competitive Hydrophilic Fumed Silica prices that fit your budget—flexible terms and customized quotes for every order.
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Tel: +8615651039172
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Long hours in the plant teach you a thing or two about what true chemical performance means for a customer. Hydrophilic fumed silica comes out of our reactors as a snow-white powder, nearly weightless, billowing like fog at the touch of air. We see the uses for this versatile material every time a drum leaves our shipping dock.
Let’s talk substance: The core of our hydrophilic fumed silica production draws from years of refining gas phase hydrolysis of silicone tetrachloride, using clean hydrogen and oxygen. We target surface areas ranging from 150 to 400 m2/g, with particle sizes in the nanometer range. Production at this size scale delivers more than just opacity or bulk — it gives our clients dispersibility and thixotropic behavior not possible from common fillers or ground silicas. The surface, loaded with silanol (Si-OH) groups, pulls moisture from the air and engages with water-based systems at a molecular level. If you’ve wrestled with keeping liquids from separating or run into caking problems, hydrophilic fumed silica provides a surprisingly straightforward fix.
Inside the plant, every production shift puts tight controls on particles, moisture content, and purity. We batch and test for BET surface area and DBP (dibutyl phthalate) absorption capacity, so end-users don’t battle surprises. Particle morphology matters: we create a branched, chainlike network that resists settling in liquids. Purity remains central; less than 0.1% residual chloride, and heavy metal contamination far below most international requirements. We aim for loss on drying under 1.5%, helping customers who need low water content for sensitive chemistries.
The most requested grades hover around 200 m2/g. Not because of a default setting — our partners in adhesives, coatings, silicone rubber, and plant-based batteries request it. For those developing products with unique rheology targets, we scale custom grades even higher or lower, matching the surface area to what actually works, not what looks good in a catalog.
Experience tells a story about hydrophilic fumed silica that other grades can’t match. There are hydrophobic versions (surface-treated for water resistance), but we don’t slap on silanes or organosilanes just to chase a trend. Hydrophilic means our product integrates with water. In high-performance coatings, a good hydrophilic grade can prevent sag and settling, even at extremely low loadings. In toothpaste, it thickens without clumping; in printer inks, it stabilizes pigment dispersions. If you reach for hydrophobic silica in these same applications, you’ll watch it float or stay clumpy, resisting the very mediums most people work in.
We’ve seen universities and R&D labs request both grades for a side-by-side comparison, and their test benches lay plain the difference. Hydrophilic fumed silica integrates into hydrogels, epoxies, and even food additives without fighting the continuous phase. If the product needs oil repellence or flow enhancement in non-aqueous systems, then hydrophobic grades play a role, but the bulk of commercial needs stick with hydrophilic.
Clients beating deadlines in real-world production environments expect more than textbook performance. In our own shipping logs, we’ve found that the largest draws come from paint and coating makers pushing for higher solids and better anti-sag properties. They rely on the network-forming ability of our fumed silica in waterborne and solventborne systems. This changes how viscosity ramps with shear; you get fluid flow under the brush or roller, but as soon as the action stops, the material “sets” and sags disappear. This feature turns low-viscosity resins into high-build coatings without fillers clogging the process equipment.
In silicone rubber compounding, the story shifts. Our materials reinforce the silicone polymer chains, delivering tensile strength and tear resistance that can’t be matched by precipitated silica or chalk. More than one customer leaning on us for medical or electronics silicones has told us they would toss entire product lines without reliable fumed silica as a thickener and reinforcement.
Pharmaceuticals and food processors need batch-to-batch consistency when manufacturing free-flowing powders. Hydrophilic fumed silica coats particles, storing up to three times its own weight in suspended water. That means tableting runs become easier, flavors remain dry and separate, and active ingredients resist cake formation even after months of storage. We built our system with high-shear mixing and filter units to keep cross-contamination and dust levels low, meeting stringent food and pharma requirements.
From our bulk silos to your process line, we’ve engineered the product to disperse fast, develop full thickening, and avoid “gelling out” or forming fisheyes. Our QC teams run wetting and dispersion tests with each lot — not every fumed silica company can say the same.
Decades in chemical manufacturing turns theory into habit. Our customers shape hydrophilic fumed silica into end-uses that go way beyond ordinary thickeners. Structural adhesives for wind turbines and EV batteries use the unique balance of rheology control and transparency. Electric vehicle battery slurries rely on the material to keep electrode materials dispersed during roll-to-roll manufacturing. Builders of paints and coatings depend on us for anti-settling performance, even at the tightest particle loading ranges.
Those seeking alternatives often return after trialing cheap bulk fillers; nothing matches the network of hydroxyl groups for hydrogen bonding in polar systems. Hydrophilic fumed silica’s microstructure delivers critical performance in cementitious materials, 3D-printed pastes, and even cosmetics. We keep working with formulation engineers who blend new polymer systems or try to shave costs, but they come back to us for that tricky balance of flow and thickening only a proper fumed silica provides.
Years of hands-on production shaped the approach we take with hydrophilic fumed silica. If paint customers ask about optimal loading levels or encounter issues with flocculation, we give practical answers, not just a datasheet. For coatings running in high-speed lines, we help customers solve with as little as 0.2% addition, avoiding the headaches of dust or clotting.
Rubber compounders know full-well that using the wrong surface area disrupts Shore hardness and impedes batch mixing. We help dial in the right surface chemistry, as generic approaches waste more than they save. Our food clients need more precise dosage for anti-caking purposes; overshoot that level, and the batch turns gloppy and unmanageable. We’ve learned these lessons out of necessity — one batch at a time.
We use customers’ feedback and our own batch performance logs as a feedback loop for plant upgrades. If major adhesive users report shear-thinning problems, R&D goes to the bench, adjusts flame parameters, and feeds the process data to the line operators. This direct pipeline from customer to reactor hall is how we keep quality and function aligned with what real-world users deal with each day.
Every operator in our industry faces dust management questions with light, ultrafine powders. Hydrophilic fumed silica flies at the lightest touch, and airborne particles can pose a respiratory nuisance even at low exposure. To address this, we invested years ago in enclosed handling equipment and upgraded our bagging lines for minimal escape. We recommend similar closed-loop handling for clients, and assist with training or process adaptation, especially for new buyers.
Another real challenge: Manufacturers often try to disperse fumed silica in high-viscosity resins without adequate mixing power. This leads to “fisheyes” and partial wetting. Our technical team frequently guides customers to add hydrophilic fumed silica at high-shear or vortex points, aiming for rapid wetting by the continuous phase. More than one client discovered that a minor shift in mixing order or speed removed quality issues without extra cost.
Moisture absorption also requires consideration. Hydrophilic fumed silica loves water; open containers in a humid plant mean material agglomerates and powder flow drops off. We suggest moisture-tight packaging for shipping and storage, and ship material in lined sacks and sealed drums to defend against ambient humidity. For users facing unavoidable humidity, we recommend regular audits and procedural updates, such as using smaller container sizes or pre-drying the powder batch before critical mixing points.
As the market moves toward more water-based and solvent-free formulations, we see demand growing in ways that standard fillers or traditional clays can’t match. Environmental regulations pressure producers to cut solvents and VOCs. Hydrophilic fumed silica lets manufacturers develop low-solvent, high-solids coatings that match or beat older systems for texture and flow.
Battery and electronics manufacturing take our powder for different reasons. High-purity, low chloride grades improve battery dispersions and increase cell longevity. New thermal insulators and aerogels take shape from our silica’s structure, delivering insulation performance for energy-efficient building materials. Medical device assembly lines need biocompatible thickening and suspension — our clean product line extends into wound care gels and medical adhesives, building trust batch after batch with the required safety and stability.
Our plant teams meet stricter traceability standards in every run. Digital track-and-trace systems were installed across our reactor line, connecting raw material intake to each lot produced. Certification for food-grade and pharma-grade material places stress on inspection and cleaning, but we follow the highest requirements. There is no tolerance for error in applications like medical grade rubber or oral care — customers trust direct manufacturers far more than secondary resellers.
Over years of partnership, we build more than a simple supplier relationship with end-users. Paint and coatings makers involve us early in new product development, and we join the troubleshooting conversations when unexpected results crop up. Our technical teams—driven by process chemists, not phone-answering intermediaries—review real mixing procedures, perform in-plant audits, and in some cases help retrofit equipment to boost silica performance. The goal stays constant: get the right degree of thickening, anti-settling, or anti-caking with the lowest cost and highest reliability.
In the cosmetic and personal care sector, brands ask about skin compatibility and regulatory compliance. We invest in continuous impurity monitoring and keep current with REACH, FDA, and other regulatory demands. Some clients specify trace impurity limits even lower than the official requirements; we regularly adjust process parameters to hit those targets.
Battery makers face unique logistical hurdles, and our advanced grades address process bottlenecks, such as rapid wetting and easier scale-up for electrode pastes. Feedback on mixing viscosity, slurry homogeneity, and drying rates becomes our roadmap for product refinement in each production campaign.
Manufacturing chemical intermediates like hydrophilic fumed silica at scale reveals gaps between stated specifications and real-world performance. Distributors and brokers might quote a good price, but the material rarely matches the unique process requirements revealed in extended runs. We build partnerships based on transparency—detailing not only what the silica should do, but also what it actually does after shipment, in your plant, in today’s conditions.
Many of our oldest customers return to direct procurement because inconsistent quality from third parties threatened their product lines. By dealing directly with us, buyers cut out supply chain uncertainty, get fresher material, and know who stands behind the powder. Our process engineers routinely visit customer sites to resolve integration issues, offering solutions based on hands-on plant experience instead of just emailed suggestions.
Quality control isn’t a department — it runs through the plant from intake to packaging. We invest heavily in spectroscopy and surface analysis on every batch, with multi-step verification to catch off-spec material before it leaves the line. Our operators log instrument results and validate particle size, moisture content, and pH. Out-of-spec batches are reworked or, if needed, discarded, not rebranded or shuffled out the back door.
Traceability anchors our product in every application, from high-end coatings to food-grade batches. Detailed batch records tie right back to production shifts and real people running the reactors. Customers can track product to the day and hour it was made, so recalls or investigations stay surgical and limited, unlike the messy uncertainty trailing anonymous bulk material through brokers.
Regulators are asking more about nano-scale materials, especially their effect on environment and health. We answer these questions because we control process from basic chemical input to finished drum. Our plant upgrades, waste handling reforms, and air emissions controls aren’t optional extras—they’re necessary investments to keep hydrophilic fumed silica production both compliant and responsible.
Demand for hydrophilic fumed silica keeps climbing as industries lean on water-based and high-performance chemistries. We adapt our plant and workforce to keep capacity and quality improving side by side. Our growth reflects the move toward advanced materials: energy storage, electronics, and healthcare now draw as much demand as old-guard sectors like paint and construction.
Every batch moves with purpose — not only to fill a purchase order, but to solve persistent, thorny manufacturing problems. As end markets evolve, we adapt surface area, particle morphology, packaging, and logistics to fit. We stay in front of regulatory scrutiny, and offer full cooperation during customer audits.
Whether powder leaves here in bulk trucks, lined totes, or moisture-sealed drums, it moves as part of a partnership grounded in years of practical feedback. Our hydrophilic fumed silica is the direct result of those lessons: easy enough for high-speed blending, pure enough for medical use, and reliable for tomorrow’s toughest applications.
