{"product_id":"sipernat-28-precipitated-silica","title":"SIPERNAT® 28 Precipitated Silica for Anti-Caking \u0026 Powder Flow","description":"\u003cstyle\u003e\n  .sd-product-content {\n    --sd-navy: #0d1b2a;\n    --sd-navy-2: #14283b;\n    --sd-green: #36b66a;\n    --sd-green-dark: #258d50;\n    --sd-gold: #b78a37;\n    --sd-cream: #f7f5ef;\n    --sd-soft: #f3f6f7;\n    --sd-border: #dfe5e8;\n    --sd-text: #24313a;\n    --sd-muted: #60707b;\n\n    max-width: 960px;\n    margin: 0 auto;\n    color: var(--sd-text);\n    line-height: 1.7;\n  }\n\n  .sd-product-content * {\n    box-sizing: border-box;\n  }\n\n  .sd-product-content a {\n    color: var(--sd-green-dark);\n  }\n\n  .sd-product-content h2 {\n    margin: 44px 0 14px;\n    color: var(--sd-navy);\n    font-size: clamp(1.5rem, 3vw, 1.9rem);\n    line-height: 1.25;\n  }\n\n  .sd-product-content h3 {\n    margin: 26px 0 9px;\n    color: var(--sd-navy);\n    font-size: 1.18rem;\n  }\n\n  .sd-lead {\n    margin-top: 0;\n    color: 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margin: 0 auto 20px;\n    color: #dce5ea;\n  }\n\n  .sd-button {\n    display: inline-block;\n    padding: 11px 21px;\n    border: 2px solid #70d697;\n    border-radius: 7px;\n    background: #70d697;\n    color: var(--sd-navy) !important;\n    font-weight: 800;\n    text-decoration: none;\n  }\n\n  @media (max-width: 749px) {\n    .sd-grid,\n    .sd-supply-grid,\n    .sd-related {\n      grid-template-columns: 1fr;\n    }\n\n    .sd-summary,\n    .sd-callout,\n    .sd-cta {\n      padding: 21px 18px;\n    }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"sd-product-content\"\u003e\n\n  \u003cp class=\"sd-lead\"\u003e\n    \u003cstrong\u003eSIPERNAT® 28\u003c\/strong\u003e from Evonik is a hydrophilic precipitated\n    silicon dioxide designed for powder conditioning, anti-caking, free-flow\n    improvement, and use as a carrier for compatible liquid ingredients.\n    Its highly porous structure combines high surface area with strong liquid\n    uptake, helping manufacturers improve powder handling, consistency, and\n    storage behavior.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    SIPERNAT® 28 is used in food and ingredient processing, feed and nutritional\n    formulations, and specialty industrial powder systems where flowability,\n    caking resistance, liquid carrying capacity, and controlled powder handling\n    are important.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"sd-summary\"\u003e\n    \u003cspan class=\"sd-eyebrow\"\u003e30-Second Summary\u003c\/span\u003e\n    \u003ch2\u003eWhat Is SIPERNAT® 28?\u003c\/h2\u003e\n    \u003cp\u003e\n      SIPERNAT® 28 is a fine precipitated silica used primarily as an\n      \u003cstrong\u003eanti-caking agent, free-flow aid, powder conditioner, and liquid\n      carrier\u003c\/strong\u003e. Typical manufacturer data include approximately\n      \u003cstrong\u003e250 m²\/g BET surface area\u003c\/strong\u003e,\n      \u003cstrong\u003e220 mL\/100 g linseed oil absorption\u003c\/strong\u003e, and approximately\n      \u003cstrong\u003e66% carrying capacity\u003c\/strong\u003e.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"sd-grid\"\u003e\n    \u003cdiv class=\"sd-card\"\u003e\n      \u003cstrong\u003eAnti-Caking \u0026amp; Flow Improvement\u003c\/strong\u003e\n      \u003cp\u003e\n        Helps reduce caking, bridging, lumping, and inconsistent powder movement\n        during processing, storage, dosing, and packaging.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"sd-card\"\u003e\n      \u003cstrong\u003eHigh Liquid Carrying Capacity\u003c\/strong\u003e\n      \u003cp\u003e\n        Its porous silica structure can absorb compatible liquids and help convert\n        them into easier-to-handle powder systems.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"sd-card\"\u003e\n      \u003cstrong\u003eIndustrial Pallet Supply\u003c\/strong\u003e\n      \u003cp\u003e\n        Supplied through Sorbents Direct in 675 lb pallet quantities with\n        multi-pallet pricing available for recurring and project requirements.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhere SIPERNAT® 28 Fits\u003c\/h2\u003e\n\n  \u003cp\u003e\n    SIPERNAT® 28 is most useful where powder flow, storage stability, or liquid\n    carrying capacity must be improved without fundamentally changing the\n    formulation format.\n  \u003c\/p\u003e\n\n  \u003cul class=\"sd-checklist\"\u003e\n    \u003cli\u003eAnti-caking and free-flow improvement\u003c\/li\u003e\n    \u003cli\u003ePowder conditioning and handling improvement\u003c\/li\u003e\n    \u003cli\u003eCarrier for compatible oils and liquid ingredients\u003c\/li\u003e\n    \u003cli\u003eDry-liquid and absorbed-liquid powder systems\u003c\/li\u003e\n    \u003cli\u003eFood and ingredient processing\u003c\/li\u003e\n    \u003cli\u003eFeed and nutritional formulations\u003c\/li\u003e\n    \u003cli\u003eIndustrial and specialty powder processing\u003c\/li\u003e\n    \u003cli\u003ePowder dosing, conveying, blending, and packaging\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv class=\"sd-callout sd-callout--green\"\u003e\n    \u003ch3\u003eSelection Starts With the Formulation\u003c\/h3\u003e\n    \u003cp\u003e\n      Precipitated silica grades should not be selected by surface area or particle\n      size alone. Liquid loading, powder chemistry, moisture, fat or oil content,\n      bulk density, desired flow behavior, and downstream processing can all affect\n      performance.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTypical Properties\u003c\/h2\u003e\n\n  \u003cdiv class=\"sd-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eProperty\u003c\/th\u003e\n          \u003cth\u003eTypical Value\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMaterial\u003c\/td\u003e\n          \u003ctd\u003ePrecipitated silicon dioxide\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSurface character\u003c\/td\u003e\n          \u003ctd\u003eHydrophilic\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eBET surface area\u003c\/td\u003e\n          \u003ctd\u003eApprox. 250 m²\/g\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMedian particle size (d50)\u003c\/td\u003e\n          \u003ctd\u003eApprox. 3.6 µm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003epH\u003c\/td\u003e\n          \u003ctd\u003eApprox. 7\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eBulk density\u003c\/td\u003e\n          \u003ctd\u003eApprox. 95 kg\/m³\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTypical carrying capacity\u003c\/td\u003e\n          \u003ctd\u003eApprox. 66%\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eLinseed oil absorption\u003c\/td\u003e\n          \u003ctd\u003eApprox. 220 mL\/100 g\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eLoss on drying\u003c\/td\u003e\n          \u003ctd\u003eApprox. 7%\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eAppearance\u003c\/td\u003e\n          \u003ctd\u003eWhite powder\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cp class=\"sd-note\"\u003e\n    Typical values are provided for general comparison and are not intended as\n    sales specifications. Refer to current Evonik technical documentation and\n    lot-specific quality documentation where applicable.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eAnti-Caking \u0026amp; Powder Flow Improvement\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Powder flow can deteriorate when fine particles are exposed to moisture,\n    pressure, temperature changes, static charge, fats, oils, or prolonged\n    storage. These conditions can contribute to caking, bridging, lumping, and\n    inconsistent feeding through processing or packaging equipment.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    SIPERNAT® 28 can help condition powder systems by modifying particle-to-particle\n    interactions and supporting more consistent flow. In a properly formulated\n    system, this can improve handling during blending, conveying, dosing, storage,\n    and packaging.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Actual dosage and performance depend on the formulation and should be\n    established through representative testing.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eCarrier for Liquid Ingredients\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The porous structure of SIPERNAT® 28 allows compatible liquids to be taken up\n    into the silica structure while maintaining a manageable powder form.\n    Manufacturer data indicate a typical carrying capacity of approximately\n    \u003cstrong\u003e66%\u003c\/strong\u003e and linseed oil absorption of approximately\n    \u003cstrong\u003e220 mL\/100 g\u003c\/strong\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This makes the grade useful where formulators need to incorporate oils or\n    other compatible liquid components into dry or free-flowing powder systems.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"sd-callout\"\u003e\n    \u003ch3\u003eCarrying Capacity Is Not a Universal Formulation Limit\u003c\/h3\u003e\n    \u003cp\u003e\n      Published carrying-capacity and oil-absorption values are useful comparison\n      properties, but actual usable loading depends on the specific liquid,\n      viscosity, formulation, mixing method, desired flowability, and finished\n      product requirements.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eFood \u0026amp; Ingredient Processing\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Evonik positions specialty precipitated silica grades such as SIPERNAT® for\n    anti-caking, flow improvement, and carrier applications within food and\n    ingredient processing.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Available manufacturer documentation for SIPERNAT® 28 includes applicable\n    regulatory and certification information. Customers should confirm the current\n    grade documentation, permitted use, use level, and regulatory requirements for\n    their specific formulation and market before commercial use.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Explore additional materials for\n    \u003ca href=\"\/collections\/food-beverage\"\u003e\u003cstrong\u003efood and beverage processing\u003c\/strong\u003e\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eIndustrial Powder Processing\u003c\/h2\u003e\n\n  \u003cp\u003e\n    SIPERNAT® 28 can also be evaluated in specialty industrial powder systems\n    where improved flow, liquid carrying capacity, reduced caking, or better\n    storage behavior is required.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Relevant process variables may include:\n  \u003c\/p\u003e\n\n  \u003cul class=\"sd-checklist\"\u003e\n    \u003cli\u003eBase powder chemistry and particle size\u003c\/li\u003e\n    \u003cli\u003eMoisture level and hygroscopicity\u003c\/li\u003e\n    \u003cli\u003eOil, fat, or liquid content\u003c\/li\u003e\n    \u003cli\u003eRequired powder flow behavior\u003c\/li\u003e\n    \u003cli\u003eBulk density and packaging requirements\u003c\/li\u003e\n    \u003cli\u003eMixing sequence and dispersion\u003c\/li\u003e\n    \u003cli\u003eConveying and dosing equipment\u003c\/li\u003e\n    \u003cli\u003eStorage temperature and humidity\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eHow to Evaluate SIPERNAT® 28\u003c\/h2\u003e\n\n  \u003cp\u003e\n    When qualifying a precipitated silica for an existing or new formulation,\n    evaluation should focus on the performance of the complete powder system\n    rather than a single published specification.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"sd-grid\"\u003e\n    \u003cdiv class=\"sd-card\"\u003e\n      \u003cstrong\u003eFlowability\u003c\/strong\u003e\n      \u003cp\u003e\n        Compare powder movement, bridging, feeding, and handling before and after\n        silica addition.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"sd-card\"\u003e\n      \u003cstrong\u003eLiquid Loading\u003c\/strong\u003e\n      \u003cp\u003e\n        Determine the loading at which the formulation maintains the desired\n        powder consistency and processing behavior.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"sd-card\"\u003e\n      \u003cstrong\u003eStorage Behavior\u003c\/strong\u003e\n      \u003cp\u003e\n        Evaluate caking, compaction, moisture exposure, and stability under\n        representative storage conditions.\n      \u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003ePackaging \u0026amp; Volume Supply\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Sorbents Direct supplies SIPERNAT® 28 in industrial pallet quantities for\n    manufacturing, formulation, and recurring production requirements.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"sd-supply-grid\"\u003e\n    \u003cdiv class=\"sd-supply-item\"\u003e\n      \u003cstrong\u003eStandard Pallet\u003c\/strong\u003e\n      675 lb total\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"sd-supply-item\"\u003e\n      \u003cstrong\u003ePackaging\u003c\/strong\u003e\n      27 × 25 lb bags\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"sd-supply-item\"\u003e\n      \u003cstrong\u003eVolume Supply\u003c\/strong\u003e\n      Multi-pallet pricing available\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"sd-supply-item\"\u003e\n      \u003cstrong\u003eFreight\u003c\/strong\u003e\n      Quoted separately by destination\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cp\u003e\n    Pricing tiers are available for multi-pallet and larger industrial\n    requirements. For recurring usage or project quantities, contact Sorbents\n    Direct with the expected volume and delivery ZIP code for a delivered-cost\n    quote.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    For broader commercial supply requirements, see our\n    \u003ca href=\"\/pages\/bulk-industrial-adsorbents-filtration-media-supplier\"\u003e\n      \u003cstrong\u003eBulk Industrial Adsorbents \u0026amp; Filtration Media Supply\u003c\/strong\u003e\n    \u003c\/a\u003e\n    page.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eStorage \u0026amp; Handling\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Precipitated silica should be stored sealed in a cool, dry environment and\n    protected from moisture and volatile substances. Its high specific surface\n    area can allow the material to interact with moisture or volatile compounds\n    from the surrounding atmosphere when packaging is left open or improperly\n    sealed.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Always review the current Safety Data Sheet before handling, transferring,\n    or using the material.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eSIPERNAT® 28 Documentation\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Technical and quality documentation is available to support purchasing,\n    qualification, and incoming-material review.\n  \u003c\/p\u003e\n\n  \u003cul class=\"sd-checklist\"\u003e\n    \u003cli\u003eTechnical Data Sheet (TDS)\u003c\/li\u003e\n    \u003cli\u003eSafety Data Sheet (SDS)\u003c\/li\u003e\n    \u003cli\u003eCertificate of Analysis (COA) for allocated material where applicable\u003c\/li\u003e\n    \u003cli\u003eAvailable regulatory and certification documentation\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    Need documentation before ordering?\n    \u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eContact Sorbents Direct\u003c\/strong\u003e\u003c\/a\u003e\n    with the product and document required.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n  \u003cdiv class=\"sd-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is SIPERNAT® 28?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        SIPERNAT® 28 is an Evonik hydrophilic precipitated silicon dioxide used\n        for powder conditioning, anti-caking, flow improvement, and as a carrier\n        for compatible liquid ingredients.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is SIPERNAT® 28 used for?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        Common applications include improving powder flow, reducing caking and\n        bridging, supporting storage stability, and incorporating compatible\n        liquid ingredients into powder systems.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs SIPERNAT® 28 suitable for food applications?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        Manufacturer documentation includes applicable regulatory and\n        certification information for relevant applications. Customers should\n        confirm current grade documentation, permitted use, use level, and\n        jurisdiction-specific requirements for their formulation.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the particle size of SIPERNAT® 28?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        Current manufacturer technical data list a typical median particle size\n        (d50) of approximately 3.6 µm.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the oil absorption of SIPERNAT® 28?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        Typical linseed oil absorption is approximately 220 mL per 100 g.\n        Actual formulation behavior depends on the liquid and process.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the carrying capacity of SIPERNAT® 28?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        Evonik reports a typical carrying capacity of approximately 66%.\n        Practical loading depends on the liquid, formulation, mixing method,\n        and required finished powder characteristics.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow is SIPERNAT® 28 packaged?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        Sorbents Direct supplies SIPERNAT® 28 in 675 lb pallet quantities\n        consisting of 27 × 25 lb bags. Multi-pallet and project pricing are\n        available.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs SIPERNAT® 28 interchangeable with other precipitated silica grades?\u003c\/summary\u003e\n      \u003cdiv class=\"sd-faq-answer\"\u003e\n        Not automatically. Precipitated silica grades can differ in particle\n        size, surface area, pore structure, bulk density, absorption capacity,\n        moisture, and handling behavior. Replacement grades should be compared\n        against current specifications and qualified in the intended formulation.\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003ch2\u003eRelated Materials \u0026amp; Resources\u003c\/h2\u003e\n\n  \u003cdiv class=\"sd-related\"\u003e\n    \u003ca href=\"\/collections\/silica\"\u003e\n      Browse Industrial Silica →\n    \u003c\/a\u003e\n\n    \u003ca href=\"\/collections\/food-beverage\"\u003e\n      Food \u0026amp; Beverage Processing →\n    \u003c\/a\u003e\n\n    \u003ca href=\"\/pages\/bulk-industrial-adsorbents-filtration-media-supplier\"\u003e\n      Bulk Industrial Supply →\n    \u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"sd-cta\"\u003e\n    \u003cspan class=\"sd-eyebrow\"\u003eQUOTE \u0026amp; TECHNICAL SUPPORT\u003c\/span\u003e\n\n    \u003ch2\u003eNeed SIPERNAT® 28 Pricing or Documentation?\u003c\/h2\u003e\n\n    \u003cp\u003e\n      Send us the required quantity, application, delivery ZIP code, and any\n      technical or regulatory documents needed. We can help with pallet pricing,\n      multi-pallet supply, freight, and product documentation.\n    \u003c\/p\u003e\n\n    \u003ca href=\"\/pages\/contact\" class=\"sd-button\"\u003e\n      Request a Quote\n    \u003c\/a\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Evonik","offers":[{"title":"675 lb pallet (27 × 25 lb bags)","offer_id":67672048861283,"sku":null,"price":4100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/7059\/2355\/files\/sipernat-28-precipitated-silica-powder.png?v=1791574638","url":"https:\/\/www.sorbentsdirect.com\/products\/sipernat-28-precipitated-silica","provider":"Sorbents Direct ","version":"1.0","type":"link"}