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HS Code |
779038 |
| Appearance | translucent white or slightly milky granules |
| Pore Structure | fine pore structure |
| Particle Size | typically ranges between 1mm to 8mm |
| Surface Area | average 450-650 m²/g |
| Pore Volume | 0.35-0.45 ml/g |
| Bulk Density | approximately 700 kg/m³ |
| Moisture Absorption | minimum 35% at RH 100% |
| Chemical Formula | SiO2·nH2O |
| Ph Range | 4 to 7 |
| Loss On Drying | ≤5% when dried at 105°C |
| Crushing Strength | ≥80 Newtons for 3-5mm beads |
| Specific Heat | 0.92 J/g·K |
As an accredited Type C Silica Gel factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Type C Silica Gel is packaged in a sealed 25 kg blue drum with moisture-proof lining and clear, bold product labeling. |
| Container Loading (20′ FCL) | 20′ FCL loading for Type C Silica Gel: Packed in 25kg bags, total net weight approximately 16,000-18,000 kg per container. |
| Shipping | Type C Silica Gel is shipped in sealed, moisture-proof packaging such as fiber drums, steel drums, or heavy-duty bags. Containers are clearly labeled and tightly closed to prevent contamination and moisture absorption. Store and handle in a cool, dry, ventilated area, following standard safety regulations for chemical materials. |
| Storage | Type C Silica Gel should be stored in tightly sealed containers to prevent moisture absorption, in a cool, dry, and well-ventilated area away from direct sunlight and incompatible substances. Avoid exposure to water or high humidity. Store at room temperature and ensure the storage area is clean and free from dust or contaminants to maintain silica gel effectiveness and prevent deterioration. |
| Shelf Life | Type C Silica Gel typically has a shelf life of 24 months when stored in a cool, dry, and sealed container. |
Applications of Type C Silica Gel in Industrial ManufacturingWith consistent micro-pore structure and high adsorption capacity, Type C Silica Gel serves critical functional roles in multiple industrial manufacturing sectors. As a direct manufacturer, we support downstream partners with quality-assured raw material tailored for practical process integration and compliance with stringent industry benchmarks. Explore how leading producers utilize Type C Silica Gel in established application settings, each governed by distinct technical standards, dosage control, process steps, and finished product demands. 1. Industrial Air Drying Units (Compressed Air Systems)Leading compressed air purification system manufacturers select Type C Silica Gel for desiccant cartridge and tower filling, ensuring effective moisture removal under variable temperature and dew point conditions. This raw material maintains stable adsorption efficiency in cycling operations, supporting reliable downstream air quality and extending equipment service life. Consistent granule hardness and controlled particle size optimize performance in regenerative dryer beds, reducing dust generation and minimizing pressure drop, which are critical for industrial pneumatic and instrument air applications. Industry compliance standards
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2. Bulk Pharmaceutical Filtration and DryingPharmaceutical process equipment builders deploy Type C Silica Gel within bulk drying and moisture scavenging units, supporting API production where stringent water content limits directly impact chemical stability and shelf life. The high purity and low extractable content align with regulatory expectations for indirect-process additives that contact pharmaceutical intermediates. Controlled particle size distribution prevents channeling in fixed beds, ensuring uniform drying and compliant batch records for critical process steps. Industry compliance standards
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3. Flexible Packaging Desiccant Inserts (Electronics and Optics)Electronics component assemblers and optics device packagers incorporate Type C Silica Gel in desiccant sachets and canisters to control micro-environmental humidity inside flexible and rigid packaging. The consistent adsorption kinetics and minimal dusting properties preserve sensitive electronic components and multi-layer films from water-induced failure, yellowing, and condensation during logistics. Manufacturers benefit from validated low-residual VOCs and non-reactivity, critical for long-term shelf stability of high-value tech goods. Industry compliance standards
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4. Industrial Catalyst Carrier and Support MediaMajor chemical process plants incorporate Type C Silica Gel as a catalyst carrier and support, where specific surface area and microporous architecture promote effective dispersion and stability of impregnated metal or organometallic catalysts. Repeatable synthesis outcomes and high hydrothermal stability allow end users to design fixed-bed reactors and continuous process lines for gas-phase or liquid-phase catalytic reactions, maintaining reactivity and flow characteristics throughout long campaigns under controlled operational loads. Industry compliance standards
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5. Paints and Industrial Coatings Moisture RemovalType C Silica Gel is favored by coatings formulators for moisture scavenging in solventborne and water-reducible paint systems. By controlling free water content and preventing gelation or viscosity shifts during production and storage, formulators achieve improved film integrity and shelf life in both bulk and packaged paints. Consistent adsorption without interfering with rheology enables large-volume production of specialty coatings requiring low haze, precise drying rates, and extended pot life in varied climatic regions. Industry compliance standards
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6. Laboratory and Analytical Sample ProtectionAccredited reference labs, testing service providers, and scientific instrument manufacturers utilize Type C Silica Gel in controlled storage systems and sample shipment containers to preserve analytical integrity and reduce sample degradation from atmospheric moisture. The low leachable profile and non-reactivity protect critical samples including environmental monitoring specimens, pharmaceutical stability batches, and certified reference materials. Batch traceability and documentation support strict audit and accreditation requirements for regulated test environments. Industry compliance standards
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Competitive Type C Silica Gel prices that fit your budget—flexible terms and customized quotes for every order.
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Tel: +8615651039172
Email: sales9@bouling-chem.com
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Every shift on our production floor brings us face-to-face with customers' real expectations for silica gel. They want performance, repeatability, and reliability over buzzwords and complexities. Type C Silica Gel often doesn’t grab headlines, yet those who know desiccants rely on this grade for situations where structure and physical integrity matter as much as adsorption. This comes from hard lessons learned in the lab, in storage warehouses, and in packaging rooms—there is no substitute for product that does what it says, every time.
Type C Silica Gel stands out for its semi-transparent, vitreous structure. Unlike more open-pored Type A, which forms the bulk of those sachets dropped in shoe boxes and pill bottles, Type C wears a smoother surface and closed pores. In simplest terms, our lines turn out Type C by controlling pH and temperature during the gelation and aging process. The outcome: a material with reduced surface area and less aggressive moisture uptake than Type A, yet with a lasting ability to keep its form under physical or chemical stress.
We target a precise pore size distribution with an average diameter around 2.5–6 nm, and a specific surface area that usually lands between 300–500 m2/g. Granule size can be adjusted according to the customer’s application—though in most cases, you’ll find Type C in bead or irregular grain form. Color maintains a clarity that lets visual inspection catch any contamination, and bulk density ranges within a fairly tight window, giving predictable results batch to batch. It’s this predictability which carries the most weight with customers running critical drying and purification systems.
The core reason operators reach for Type C on the shop floor comes down to form toughness and selective pore structure. In chromatography columns—especially those for biomolecule separations—Type C silica gel holds its shape under the steep pressure gradients and frequent solvent washing. It won’t break down and cloud up the system like more fragile gels might. This durability means fewer column changes and less downtime. For us, keeping this standard means regular checks in our process for gel strength and pore uniformity using continuous in-line QC systems, and this routine has slashed complaints from end-users by a factor noticeable in our returns log.
Another arena where Type C gets the call is in moisture-sensitive bulk packaging, especially for chemicals, vitamins, and powdered milk. When direct contact with powder contents raises risks of caking or chemical interaction, Type C’s less aggressive, less reactive surface provides gentle moisture management without pulling volatile compounds out of the product itself. Our experience with customers in the food and pharmaceutical sectors confirms that this gentle approach is non-negotiable for sensitive, high-value products.
Laboratories frequently leverage Type C for specialized processes—often as a stationary phase in thin-layer or column chromatography, or as a support for catalysts in organic synthesis. Its resilience and well-defined pore size allow researchers to repeat experiments with minimal batch-to-batch result drift. Our QC lab regularly communicates directly with these customers, gathering feedback not only on gel quality but also on how washing solvents or process conditions may alter performance after repeated cycles.
We’ve produced every major grade of silica gel—Type A, B, C, and specialty hybrids—over the decades. The greatest source of confusion, especially for new buyers or formulation teams, comes from assuming one type suits all needs. Type A, with its highly open pore system (around 24 Angstroms), pulls moisture hard and fast but crumbles quickly under harsh chemicals or repeated cycling. Type B serves as a bit of a hybrid, sitting between A and C with intermediate structure and adsorption properties. Type C, by contrast, earns its place for scenarios demanding both physical integrity and selective moisture control.
Here’s what real-world production and customer feedback taught us: Type C’s lower internal surface area (relative to Type A) trades raw adsorption horsepower for greater resistance to attrition and chemical attack. This gives technicians in petrochemical plants and pharmaceutical packaging lines peace of mind—less dust, less product migration, and fewer ruined batches. In chromatography, only Type C can consistently support solvents with high pH or aggressive organic components. Numerous conversations with clients facing clogged filtration systems convinced us to refine our process and measurement regimen, ensuring a tighter control of bead hardness and attrition index.
Economic value is another difference that surfaces over time. Projects that once specified Type A often saw higher subsequent costs from product loss, downtime, and excessive maintenance. Process engineers running fine chemicals quickly calculated that the longer cycle life and reduced handling requirements of Type C delivered better return on investment, even if nominal material cost appeared slightly higher upfront. Every facility tour and root cause analysis we’ve carried out highlighted that the biggest cost rarely comes from the base material—it’s the hidden costs of interrupted processes, staff time, and off-spec product that add up.
Time and again, we’ve traced silica gel quality factors back to the raw sodium silicate and water source. Type C is especially sensitive to impurity load. If trace elements aren’t controlled, they propagate into the final gel, leading to batch instability, color variations, and even impact on chromatography separations downstream. We work with raw material suppliers on strict incoming inspection protocols, beyond the minimums laid out in most technical sheets. Our in-house lab pulls representative samples from each delivery and screens both by classical wet methods and rapid non-destructive spectrometry.
A decade ago, a minor deviation in silicate supplier standards led to a string of customer complaints about fogging during pharmaceutical packaging. That experience forced a complete overhaul of our vendor selection and monitoring process, and now we maintain a much tighter loop between raw material QC and final product sign-off. This shift reduced off-spec production runs significantly and saw customer returns drop to record lows.
Specifications like pore size, bead size, and surface area matter for technical comparison, but field trials reveal the deeper differences. In practice, theoretical surface area sometimes takes a back seat to other factors like dust generation, ease of handling in automated lines, and actual performance over many drying cycles. We send out bulk samples of new batches to regular clients, who run them in conditions well beyond our lab’s simulation ability. It’s these hands-on results—in paint drying drums, solvent reclamation rigs, and drug packaging lines—that ultimately shape adjustments to our process control.
Direct partnerships with users have led to unexpected innovations. For instance, a pharmaceutical client’s request for extremely low chloride content demanded we redesign part of the washing process. This drove up yield losses in the short term, but ultimately opened new markets in electronics and high-purity chemical manufacturing. Adjusting our process to this level of customer-driven detail only worked because we maintain flexible, vertically integrated production and a direct communication line from end users back to our plant managers and R&D leads.
Producing Type C silica gel isn’t merely a matter of running a recipe on autopilot. Pore structure swings with subtle variations in water chemistry or seasonal changes in ambient temperature and humidity. Even minor lapses in drying oven calibration show up as clumping or insufficient pore closure. Every process improvement came from addressing problems first seen by line workers—early caking in bins, powder contamination in bulk bags, and inconsistent bead sizing. These aren’t textbook issues. They call for continuous feedback between R&D, line management, and quality teams.
Long-term, we face two big hurdles: energy use during drying and growing demand for environmentally friendlier manufacturing. Meeting these requires capital investment in more efficient kiln and condensation units and replacing old acid recovery with closed-loop systems. We’re developing alternate drying profiles to maintain gel quality at lower energy input, with pilot lines already cutting gas consumption by around 18 percent. Chemistry schools and process consultants bring steady proposals, but experience shows that the most practical advances always come from our own experienced operators, who’ve handled gel with their own hands for years.
Manufacturing and handling large volumes of silica gel present real safety considerations, not just checkbox regulation compliance. As a pure mineral product, Type C carries low direct toxicity, but inhalable dust, chipping, or packaging line jams can cause both acute and chronic issues. Our production spaces run high-efficiency particulate filtration and require full-fit respirators in high-exposure areas. Regular employee training means every operator knows how to spot problems, from simple filter issues to signs of compromised bead batches.
From an end-user’s perspective, Type C consistently passes global regulatory hurdles for use in food packaging, nutritional supplements, and sensitive pharmaceutical processes when properly manufactured. We continue to run periodic third-party verification, above and beyond standard certifications, to ensure there is no drift over the years in impurity profiles or residual solvent levels. Feedback from our largest clients in food and pharma—who keep independent labs—has shaped how tightly we monitor and document every outbound lot.
Industry trends shift toward hybrid and hybrid-organic desiccants, but end-users with large-scale column, packaging, or specialty chemical operations still lean on the repeatable performance and sturdiness of Type C. As regulations tighten and customers demand better records and batch-to-batch reproducibility, the value of a well-controlled, trusted Type C production line only rises. Engineers and procurement managers have told us as much when reviewing lifetime cost and true risk mitigation from product failures.
Over the decades, the role of the manufacturer has expanded from supplier to industry partner. Responsive manufacturing—adjusting bead size, impurity levels, or pore diameter to unique customer needs—has built loyalty spanning product generations. The future will certainly bring fresh technical and environmental pushes, but every meaningful advance in Type C silica gel development still comes from a willingness to work directly with the communities and companies that rely on the product. This mindset, shaped by years of feedback and production experience, keeps our focus on what truly matters: gel that works predictably in the field, batch after batch.
