SIPERNAT® 28 Precipitated Silica for Anti-Caking & Powder Flow
SIPERNAT® 28 Precipitated Silica for Anti-Caking & Powder Flow - 675 lb pallet (27 × 25 lb bags) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Buy 2+ pallets to save 5%, 4+ to save 7%, or 9+ to save 14% - automatically applied at checkout.
| Minimum Qty | Discount |
|---|---|
| 2 + | 5% off |
| 4 + | 7% off |
| 9 + | 14% off |
SIPERNAT® 28 from Evonik is a hydrophilic precipitated silicon dioxide designed for powder conditioning, anti-caking, free-flow improvement, and use as a carrier for compatible liquid ingredients. Its highly porous structure combines high surface area with strong liquid uptake, helping manufacturers improve powder handling, consistency, and storage behavior.
SIPERNAT® 28 is used in food and ingredient processing, feed and nutritional formulations, and specialty industrial powder systems where flowability, caking resistance, liquid carrying capacity, and controlled powder handling are important.
What Is SIPERNAT® 28?
SIPERNAT® 28 is a fine precipitated silica used primarily as an anti-caking agent, free-flow aid, powder conditioner, and liquid carrier. Typical manufacturer data include approximately 250 m²/g BET surface area, 220 mL/100 g linseed oil absorption, and approximately 66% carrying capacity.
Helps reduce caking, bridging, lumping, and inconsistent powder movement during processing, storage, dosing, and packaging.
Its porous silica structure can absorb compatible liquids and help convert them into easier-to-handle powder systems.
Supplied through Sorbents Direct in 675 lb pallet quantities with multi-pallet pricing available for recurring and project requirements.
Where SIPERNAT® 28 Fits
SIPERNAT® 28 is most useful where powder flow, storage stability, or liquid carrying capacity must be improved without fundamentally changing the formulation format.
- Anti-caking and free-flow improvement
- Powder conditioning and handling improvement
- Carrier for compatible oils and liquid ingredients
- Dry-liquid and absorbed-liquid powder systems
- Food and ingredient processing
- Feed and nutritional formulations
- Industrial and specialty powder processing
- Powder dosing, conveying, blending, and packaging
Selection Starts With the Formulation
Precipitated silica grades should not be selected by surface area or particle size alone. Liquid loading, powder chemistry, moisture, fat or oil content, bulk density, desired flow behavior, and downstream processing can all affect performance.
Typical Properties
| Property | Typical Value |
|---|---|
| Material | Precipitated silicon dioxide |
| Surface character | Hydrophilic |
| BET surface area | Approx. 250 m²/g |
| Median particle size (d50) | Approx. 3.6 µm |
| pH | Approx. 7 |
| Bulk density | Approx. 95 kg/m³ |
| Typical carrying capacity | Approx. 66% |
| Linseed oil absorption | Approx. 220 mL/100 g |
| Loss on drying | Approx. 7% |
| Appearance | White powder |
Typical values are provided for general comparison and are not intended as sales specifications. Refer to current Evonik technical documentation and lot-specific quality documentation where applicable.
Anti-Caking & Powder Flow Improvement
Powder flow can deteriorate when fine particles are exposed to moisture, pressure, temperature changes, static charge, fats, oils, or prolonged storage. These conditions can contribute to caking, bridging, lumping, and inconsistent feeding through processing or packaging equipment.
SIPERNAT® 28 can help condition powder systems by modifying particle-to-particle interactions and supporting more consistent flow. In a properly formulated system, this can improve handling during blending, conveying, dosing, storage, and packaging.
Actual dosage and performance depend on the formulation and should be established through representative testing.
Carrier for Liquid Ingredients
The porous structure of SIPERNAT® 28 allows compatible liquids to be taken up into the silica structure while maintaining a manageable powder form. Manufacturer data indicate a typical carrying capacity of approximately 66% and linseed oil absorption of approximately 220 mL/100 g.
This makes the grade useful where formulators need to incorporate oils or other compatible liquid components into dry or free-flowing powder systems.
Carrying Capacity Is Not a Universal Formulation Limit
Published carrying-capacity and oil-absorption values are useful comparison properties, but actual usable loading depends on the specific liquid, viscosity, formulation, mixing method, desired flowability, and finished product requirements.
Food & Ingredient Processing
Evonik positions specialty precipitated silica grades such as SIPERNAT® for anti-caking, flow improvement, and carrier applications within food and ingredient processing.
Available manufacturer documentation for SIPERNAT® 28 includes applicable regulatory and certification information. Customers should confirm the current grade documentation, permitted use, use level, and regulatory requirements for their specific formulation and market before commercial use.
Explore additional materials for food and beverage processing.
Industrial Powder Processing
SIPERNAT® 28 can also be evaluated in specialty industrial powder systems where improved flow, liquid carrying capacity, reduced caking, or better storage behavior is required.
Relevant process variables may include:
- Base powder chemistry and particle size
- Moisture level and hygroscopicity
- Oil, fat, or liquid content
- Required powder flow behavior
- Bulk density and packaging requirements
- Mixing sequence and dispersion
- Conveying and dosing equipment
- Storage temperature and humidity
How to Evaluate SIPERNAT® 28
When qualifying a precipitated silica for an existing or new formulation, evaluation should focus on the performance of the complete powder system rather than a single published specification.
Compare powder movement, bridging, feeding, and handling before and after silica addition.
Determine the loading at which the formulation maintains the desired powder consistency and processing behavior.
Evaluate caking, compaction, moisture exposure, and stability under representative storage conditions.
Packaging & Volume Supply
Sorbents Direct supplies SIPERNAT® 28 in industrial pallet quantities for manufacturing, formulation, and recurring production requirements.
Pricing tiers are available for multi-pallet and larger industrial requirements. For recurring usage or project quantities, contact Sorbents Direct with the expected volume and delivery ZIP code for a delivered-cost quote.
For broader commercial supply requirements, see our Bulk Industrial Adsorbents & Filtration Media Supply page.
Storage & Handling
Precipitated silica should be stored sealed in a cool, dry environment and protected from moisture and volatile substances. Its high specific surface area can allow the material to interact with moisture or volatile compounds from the surrounding atmosphere when packaging is left open or improperly sealed.
Always review the current Safety Data Sheet before handling, transferring, or using the material.
SIPERNAT® 28 Documentation
Technical and quality documentation is available to support purchasing, qualification, and incoming-material review.
- Technical Data Sheet (TDS)
- Safety Data Sheet (SDS)
- Certificate of Analysis (COA) for allocated material where applicable
- Available regulatory and certification documentation
Need documentation before ordering? Contact Sorbents Direct with the product and document required.
Frequently Asked Questions
What is SIPERNAT® 28?
What is SIPERNAT® 28 used for?
Is SIPERNAT® 28 suitable for food applications?
What is the particle size of SIPERNAT® 28?
What is the oil absorption of SIPERNAT® 28?
What is the carrying capacity of SIPERNAT® 28?
How is SIPERNAT® 28 packaged?
Is SIPERNAT® 28 interchangeable with other precipitated silica grades?
Related Materials & Resources
Need SIPERNAT® 28 Pricing or Documentation?
Send us the required quantity, application, delivery ZIP code, and any technical or regulatory documents needed. We can help with pallet pricing, multi-pallet supply, freight, and product documentation.
Request a Quote
SIPERNAT® 28 Precipitated Silica for Anti-Caking & Powder Flow
