Potassium Aluminium Silicate
Potassium Aluminium Silicate, commonly identified as E555 or INS 555, is an inorganic aluminosilicate-based anticaking and powder-flow support ingredient used in selected dry food systems where regulations permit its use.
For industrial food manufacturers, Potassium Aluminium Silicate is evaluated for caking prevention, dry-blend flowability, carrier performance, powder dispersion, humidity resistance, bulk handling consistency and packaging stability. It is most relevant to dry products such as seasonings, powdered beverages, premixes, salt systems, bakery mixes, powdered flavours, dry concentrates and mineral carrier systems.
Product identity
| Product name | Potassium Aluminium Silicate |
|---|---|
| Common names | Potassium aluminum silicate, potassium aluminosilicate, hydrated potassium aluminium silicate, mica-type aluminosilicate |
| Category | Anticaking, Flow & Mineral Carriers |
| Function | Anticaking agent, flow aid, dry carrier, mineral carrier and powder-processing support ingredient where permitted |
| E / INS number | E555 / INS 555 |
| CAS / identity | 12001-26-2 |
| Chemical identity | Variable inorganic potassium aluminosilicate mineral composition; supplier specification should define oxide composition and purity basis |
| Typical composition basis | Usually controlled by silicon dioxide, aluminium oxide, potassium oxide, moisture, loss on ignition and acid-soluble impurities |
| Typical physical form | Fine white to off-white powder, micronized powder, free-flowing powder or carrier grade depending on supplier specification |
| Functional character | Insoluble mineral powder that improves dry flow, limits caking and supports carrier performance in selected powder systems |
| Handling focus | Dust control, dry storage, particle-size consistency, clean handling, lot traceability and regulatory verification |
| Nutrition note | Not normally used as a potassium nutrient source; treat as a technological anticaking/carrier ingredient |
Application fit
Potential use areas may include the following when permitted by local food law, finished-product specification and buyer quality system:
- Powdered beverages, instant drink mixes and dry concentrates
- Seasonings, spice blends, savoury powders and seasoning salts
- Bakery mixes, pancake mixes, cake mixes and dough-system dry blends
- Dry premixes for vitamins, minerals, flavours and functional ingredients
- Salt products and salt-based carrier systems where permitted
- Powdered sauces, soup powders, gravy bases and culinary dry mixes
- Confectionery powders, dusting powders and sugar-based dry systems
- Dry carrier systems for flavours, colours, acids, enzymes or minor ingredients where suitable
Technical purchasing notes
When reviewing Potassium Aluminium Silicate, compare the supplier specification against the intended dry food application, powder matrix, particle-size requirement, target flow behaviour, humidity exposure, packaging barrier, dosage level, label expectations and local rules. A technically complete inquiry should include target grade, E555 / INS 555 requirement, particle size, bulk density, intended application, quantity, destination country, packaging preference and document requirements.
Anticaking performance is matrix-specific. A grade that works in salt may not perform the same way in powdered beverages, spices, protein powders, dry sauces or bakery mixes. Performance depends on particle size distribution, surface area, moisture adsorption, oil absorption, powder hygroscopicity, fat content, crystal type, sugar content, electrostatic behaviour, blending time, compression during transport and storage humidity.
Industrial formulation considerations
Caking control and moisture management
Powder caking can occur when moisture dissolves the surface of crystals or sticky particles and later creates bridges between particles. Potassium Aluminium Silicate can help by increasing particle separation, supporting dry flow and reducing moisture-driven clumping in suitable powder matrices.
- Define the main caking mechanism: moisture uptake, oil migration, compression, temperature cycling or particle bridging.
- Test performance at the expected warehouse humidity and transport conditions.
- Evaluate caking after storage, not only immediately after blending.
- Use packaging with adequate moisture barrier for hygroscopic powders.
- Confirm that the additive does not create haze, sediment or gritty texture after reconstitution.
Carrier and flow-aid performance
In premixes and dry concentrates, Potassium Aluminium Silicate may be evaluated as a mineral carrier or flow aid for minor ingredients. Carrier performance depends on surface area, particle morphology, adsorptive capacity, compatibility with active ingredients and mixing uniformity.
- Check whether the ingredient acts as a carrier, flow aid, anticaking agent or processing aid in the specific formula.
- Validate distribution of low-dose ingredients after blending and transport vibration.
- Evaluate segregation risk when particle size or density differs from the base powder.
- Review compatibility with oils, flavours, acids, colours, enzymes and vitamins.
- Confirm label declaration and carry-through into the finished product.
Specification parameters to compare
| Parameter | Why it matters for food manufacturers |
|---|---|
| Food-grade status | Confirms that the material is intended for food use and supported by appropriate additive, quality and safety documentation. |
| E555 / INS 555 declaration | Supports regulatory review, import checks, label approval and buyer specification matching. |
| Oxide composition | Silicon dioxide, aluminium oxide and potassium oxide content help define material identity and batch consistency. |
| Loss on drying / moisture | Affects flowability, caking risk, assay basis, shelf life and dry-blend stability. |
| Loss on ignition | Supports mineral specification review and can indicate bound water, volatile matter or composition variation. |
| pH of dispersion | Useful for compatibility review with acids, colours, flavours, proteins, enzymes and reconstituted systems. |
| Particle size distribution | Critical for flow performance, dusting, blending uniformity, mouthfeel, suspension behaviour and segregation risk. |
| Bulk density / tapped density | Affects dosing, hopper flow, packaging volume, blending behaviour and shipping efficiency. |
| Surface area / adsorption capacity | Relevant for carrier performance, moisture management, oil adsorption and powder-flow improvement. |
| Acid-soluble substances | Important for assessing potential soluble impurities and finished-product compatibility in acidic systems. |
| Heavy metals / elemental impurities | Required for food safety review, customer specifications and destination-market compliance. |
| Aluminium-related limits | Important because aluminium-containing additives may be restricted or scrutinized differently across markets. |
| Microbiological profile | Usually low risk for mineral powders, but may still be required for dry blends, nutrition systems and sensitive categories. |
| Packaging material | Protects against moisture uptake, contamination, odour pickup, dust leakage and transport damage. |
| Shelf life and storage conditions | Supports inventory planning, QA release and long-term performance in dry powder systems. |
Food manufacturing applications
Powdered beverages and instant drinks
Potassium Aluminium Silicate may be evaluated in powdered beverages and instant mixes where free flow, rapid dispensing and caking resistance are important. Application trials should check flowability, moisture uptake, reconstitution, sediment, haze, mouthfeel, flavour release and regulatory acceptance.
Seasonings and spice blends
Spices and seasoning powders can cake because of hygroscopic salts, sugars, acids, oils and flavour compounds. A flow aid can improve handling, dosing and packaging, but sensory impact, colour, speckling and declaration requirements should be checked carefully.
Dry premixes and micro-ingredient blends
In dry premixes, Potassium Aluminium Silicate may improve powder mobility and reduce clumping of low-dose ingredients. Premix manufacturers should validate uniformity, segregation, particle-density differences, carrier compatibility and batch-to-batch dosing accuracy.
Bakery mixes and dough systems
Dry bakery mixes may include sugars, salts, leavening acids, bicarbonates, starches, milk powders and flavours that respond differently to humidity. Anticaking support should be tested for storage stability, dispersion, dough performance and final texture.
Salt products and salt-based carriers
Salt can cake under humidity cycling and compression during palletized storage. If E555 is permitted for the target salt product and destination market, performance should be validated through realistic salt-flow, packing and storage trials.
Powdered sauces and culinary bases
Soup powders, sauce bases, gravy powders and savoury dry mixes may require flow control due to salt, sugar, starch, hydrocolloids, fats and flavours. Trials should check dry flow, lumping, dispersion in hot and cold water, mouthfeel and finished-product appearance.
Powder-flow and caking evaluation guidance
Potassium Aluminium Silicate should be approved through practical powder-flow testing, not only by comparing chemical specifications. The most reliable evaluation uses the actual finished powder, the actual packaging and the expected warehouse or transport conditions.
- Measure baseline flow before adding anticaking agent.
- Test several dosage levels within the permitted regulatory range.
- Evaluate angle of repose, flow through funnels, hopper discharge and bridging tendency.
- Perform storage trials under expected humidity, temperature and compression conditions.
- Check powder after vibration, pallet stacking and container transport simulation where relevant.
- Confirm reconstitution behaviour, sediment, haze, mouthfeel and visible particles in instant products.
- Use sensory review for products where mineral particles may affect texture or appearance.
Process engineering and plant handling
Industrial use of Potassium Aluminium Silicate requires controls for dust, weighing accuracy, blending uniformity, operator exposure and cross-contamination. Fine mineral powders can become airborne during bag opening, tipping and mixing, so plants should review local ventilation, PPE, dust extraction, housekeeping and SDS instructions before use.
- Use calibrated scales or automated dosing systems for low-level addition.
- Control dust during bag opening, tipping, transfer and blending.
- Pre-blend with a portion of the base powder when needed to improve distribution.
- Validate mixing time and sampling plan for uniform distribution.
- Prevent carry-over into products where E555 is not permitted or not declared.
- Clean hoppers, screw feeders, ribbon blenders and packaging lines according to the plant food-safety plan.
- Retain batch records linking additive lot, dosage, production batch and finished-product lot.
Quality, safety and compliance checklist
- Confirm food-grade status and the exact specification standard referenced by the supplier.
- Verify whether E555 / INS 555 is permitted for the intended food category and destination market.
- Confirm maximum use level, aluminium-related restrictions and label declaration requirements.
- Request oxide composition, loss on drying, loss on ignition, pH, particle size, bulk density and heavy metal limits.
- Check whether the product is natural mineral-derived, purified, micronized, treated or blended with another carrier.
- Review acid-soluble substances and soluble aluminium limits where required by customer or market rules.
- Validate anticaking performance under the expected humidity, compression and storage conditions.
- Assess mouthfeel, colour, visible speckling, sediment and reconstitution behaviour in the finished product.
- Verify lot traceability from manufacturer to exporter, including batch number, production date and expiry or retest date.
- Review the SDS for dust exposure, respiratory precautions, eye irritation and handling recommendations.
- Request allergen, GMO, vegan, halal, kosher and irradiation statements when required by the buyer or destination market.
- Do not approve use in sensitive nutrition, infant, medical or export products without specific regulatory confirmation.
Documents to request
- Product specification or technical data sheet
- Certificate of analysis for the offered batch or lot
- Safety data sheet with dust-handling guidance
- Food-grade declaration and intended-use statement
- E555 / INS 555 additive-status statement where available
- Country of origin, manufacturer statement and lot traceability declaration
- Shelf-life, retest period and storage-condition statement
- Particle-size distribution, bulk density and flow-related data where available
- Oxide composition and mineral identity declaration
- Heavy metals, elemental impurities and aluminium-related declaration
- Acid-soluble substances declaration where required by the buyer specification
- Microbiological specification when required for sensitive dry blends
- Allergen, GMO, vegan, halal, kosher and irradiation statements when required
- Packaging specification, net weight, pallet pattern and container-loading information
- Market-specific declarations required by the destination country or buyer quality system
Packaging, handling and storage
Potassium Aluminium Silicate should be stored in tightly closed original packaging in a dry, clean and well-ventilated warehouse. The material should be protected from moisture, contamination, strong odours and unnecessary dust generation. Opened bags should be resealed promptly and identified with the lot number, opening date and remaining quantity.
For export shipments, buyers should confirm net weight, packaging type, inner liner, bag or drum specification, pallet configuration, label language, batch marking, container-loading details, dust containment, moisture protection and whether the receiving warehouse can maintain dry storage conditions. For dry blends and instant products, packaging cleanliness and particle-size consistency are especially important for QA approval.
Quotation and sourcing variables
| Inquiry item | Information to provide |
|---|---|
| Target grade | Food grade, E555 / INS 555, customer specification, anticaking grade, carrier grade or premix-ready grade. |
| Physical form | Fine powder, micronized powder, free-flowing powder, granule or carrier grade. |
| Specification basis | Required particle size, bulk density, moisture, loss on ignition, oxide composition, heavy metal limits and aluminium-related limits. |
| Application | Powdered beverage, seasoning, premix, bakery mix, salt product, sauce powder, soup powder, flavour carrier or dry concentrate. |
| Functional target | Caking prevention, improved flow, carrier performance, oil adsorption, moisture control, dosing accuracy or dry-blend stability. |
| Process requirements | Target dosage, humidity exposure, packaging type, blending equipment, reconstitution requirement, sediment tolerance or mouthfeel limit. |
| Quantity | Trial quantity, first commercial order, annual demand and shipment frequency. |
| Destination | Country, port, delivery address, Incoterms preference and import documentation requirements. |
| Packaging | Bag, carton, drum, liner, net weight, pallet requirement and container-loading preference. |
| Documentation | COA, TDS, SDS, food-grade declaration, E555 statement, origin, shelf life, allergen/GMO/halal/kosher statements and market-specific documents. |
How to request this product
Send the product name, target grade or reference specification, required particle size, bulk density, intended application, target flow or anticaking function, quantity, destination country, preferred packaging, delivery term, expected shipment date and documentation checklist. If you already purchase Potassium Aluminium Silicate, attach your current specification, certificate of analysis, SDS, process requirement or finished-product label requirement so supplier options can be compared more accurately.
Useful answers
What is Potassium Aluminium Silicate used for in food manufacturing?
Potassium Aluminium Silicate is used as an anticaking agent, flow aid and mineral carrier in selected dry food systems such as seasonings, powdered beverages, premixes, dry concentrates, bakery mixes and salt-based products where permitted.
How does it reduce caking?
It can help improve powder separation, reduce moisture-driven particle bridging and support free flow. Performance depends on particle size, surface area, dosage, powder composition, humidity exposure and packaging barrier.
What is the E number for Potassium Aluminium Silicate?
Potassium Aluminium Silicate is commonly identified as E555 or INS 555. Buyers should confirm whether E555 is permitted for the intended product category and destination market before use.
Is Potassium Aluminium Silicate a potassium nutrient source?
No. It is normally used as an insoluble mineral anticaking or carrier ingredient, not as a potassium fortification ingredient. Potassium or mineral nutrition claims should not be made unless specifically supported by regulation and analysis.
Why are particle size and bulk density important?
Particle size and bulk density affect flow improvement, dusting, blending uniformity, segregation, reconstitution, sediment, mouthfeel and packaging efficiency. The correct grade depends on the specific powder matrix and equipment.
Can Global Food Additives source Potassium Aluminium Silicate?
Global Food Additives can review sourcing options according to target specification, food-grade requirement, particle size, bulk density, quantity, destination, packaging preference and documentation needs.
Which documents should be requested?
Buyers commonly request a technical data sheet, certificate of analysis, safety data sheet, food-grade declaration, E555 statement, oxide composition, particle-size data, origin statement, shelf-life statement, storage conditions, packaging details, traceability information and market-specific declarations.
Is this product permitted in every country?
No. Food additive use, approval status, maximum levels, aluminium-related restrictions and label wording depend on destination-market rules, food category, use level and buyer responsibility.
Tell us which food additive or ingredient you need.
Send product names, target specifications, quantity, destination country, packaging preference, delivery term and document requirements. Our team will review your inquiry and respond from orders@foodgradeadditives.com.
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