Diatomaceous Earth
Diatomaceous Earth, also known as diatomite, kieselguhr or kieselgur, is a naturally derived siliceous mineral material used in selected food and food-processing systems for powder flow, caking prevention, absorbent carrier performance, filtration support, liquid clarification and dry-blend handling. It is considered in powdered beverages, seasonings, salt products, spice blends, bakery mixes, premixes, edible-oil processing, beverage clarification, sugar processing and selected processing-aid applications.
For industrial buyers, Diatomaceous Earth should be evaluated as a mineral-grade, specification-sensitive material rather than a generic powder. The correct supplier grade can affect powder flow, dusting, filter permeability, liquid clarity, sediment loading, carrier capacity, caking behaviour, crystalline silica exposure, heavy-metal compliance, label declaration, regulatory approval and batch-to-batch process consistency.
Product identity
| Product name | Diatomaceous Earth |
|---|---|
| Common technical names | Diatomite; Kieselguhr; Kieselgur; Diatomaceous Silica |
| Category | Anticaking, Flow & Mineral Carriers |
| Functional class | Anticaking agent / flow aid / carrier / absorbent mineral / filtration aid / processing aid |
| E / INS number | Confirm by destination market, application and supplier documentation |
| CAS / identity | 61790-53-2 |
| Chemical nature | Naturally derived siliceous material mainly composed of amorphous silica from fossilised diatom structures |
| Typical composition focus | Silica-rich mineral matrix with supplier-dependent levels of moisture, alumina, iron oxide, salts, clay minerals and trace impurities |
| Typical commercial form | Fine powder, granular grade, carrier grade, filter-aid grade or processed mineral powder |
| Important grade distinction | Food-grade, feed-grade, filter-aid, calcined, flux-calcined, pest-control and industrial grades are not automatically interchangeable |
| Primary technical purpose | Powder-flow improvement, caking reduction, liquid clarification, filtration support and absorbent carrier performance |
Application fit
Diatomaceous Earth is normally considered where powder behaviour, liquid clarification, moisture management, carrier performance or filtration efficiency is important. Potential industrial use areas may include:
- Powdered beverages, instant drink mixes, mineral premixes and dry nutrition systems
- Seasonings, spice blends, savoury powders, salt products and dry flavour carriers
- Bakery mixes, flour-based premixes, pancake mixes and dry batter systems
- Edible-oil filtration, beverage clarification, syrup handling and sugar processing
- Tableting dusting systems, dry-blend carriers and absorbent mineral supports
- Processing-aid applications where filter permeability, solids capture or clarification is required
Industrial function and formulation value
Diatomaceous Earth is valued because its porous mineral structure can help absorb small amounts of liquid, separate particles, improve flow in dry systems and support filtration of suspended solids. In dry food blends, it may reduce sticking, clumping, bridge formation and poor hopper discharge. In filtration applications, it can form a porous filter cake that helps capture fine particles while maintaining liquid flow through the filtration system.
The product must be selected carefully because different grades are produced for different purposes. A grade designed for beverage or oil filtration may not have the same particle size, permeability, dust profile or regulatory status as a grade intended for dry-blend anticaking or carrier use. Calcined or flux-calcined grades may have different crystalline silica profiles and should not be assumed suitable for food-contact or direct-food applications without full supplier documentation and regulatory review.
Technical performance considerations
Powder flow and anticaking
In dry blends, Diatomaceous Earth can help reduce caking by absorbing surface moisture, improving particle separation and reducing stickiness. Performance should be validated under realistic warehouse humidity, compaction, vibration and storage conditions.
Carrier and absorbent behaviour
Carrier grades may be used to support flavours, colours, oils, liquid extracts or processing aids in dry formats. Buyers should check oil absorption, bulk density, particle size and sensory neutrality to avoid dusting, grittiness or uneven distribution.
Filtration aid performance
Filter-aid grades are selected according to permeability, particle-size distribution, filter-cake structure, clarity target and solids loading. The wrong grade can cause slow filtration, poor clarification, filter blinding or excessive product loss.
Crystalline silica control
Crystalline silica content is a critical occupational-safety and regulatory parameter. Food manufacturers should request a crystalline silica declaration and distinguish natural, calcined and flux-calcined grades before approval.
Typical manufacturing applications
| Application area | Technical role | Purchasing and formulation notes |
|---|---|---|
| Powdered beverages and dry nutrition mixes | Supports powder flow, moisture management, carrier performance and dry-blend handling. | Check particle size, bulk density, dusting, sensory impact, sedimentation after reconstitution, mineral taste and regulatory status for the target market. |
| Seasonings, spice blends and flavour carriers | Can absorb oil-based flavours, reduce tackiness and support consistent dosing of dry flavour systems. | Evaluate flavour release, colour impact, dusting, oil absorption, blend uniformity, caking under humidity and label declaration. |
| Salt products and dry mineral blends | May improve flow, reduce lumping and support anticaking performance in hygroscopic products. | Review use level, sodium or mineral claims, humidity exposure, packaging barrier, flow through filling equipment and destination-market rules. |
| Bakery mixes and dry batter systems | Can support dry-blend handling, anti-sticking performance and carrier function for liquid or oily micro-ingredients. | Test with flour, sugar, fat powders, leavening agents, cocoa, dairy solids, gums, enzymes and storage humidity to confirm no negative texture or flavour impact. |
| Edible-oil processing and filtration | Forms a porous filter cake to help remove suspended solids, fines or processing residues. | Choose grade by permeability, particle size, oil retention, clarity target, filtration pressure, cake release, disposal requirements and food-grade approval. |
| Beverage, syrup and sugar processing | Supports clarification and solids removal in selected process streams. | Validate product clarity, colour retention, flavour neutrality, filter loading, precoat and body-feed strategy, residue control and processing-aid status. |
| Tablets and compressed products | May be reviewed as a dusting, flow or carrier aid in some dry compression systems. | Check compressibility, abrasive effect, mouthfeel, dust control, tablet hardness, friability, disintegration and regulatory category. |
Specification points to review before approval
Industrial buyers should compare supplier specifications against internal quality standards, process requirements, customer expectations and destination-market legislation. A robust technical review normally covers:
- Silicon dioxide content: Confirms the silica-rich nature of the mineral and supports comparison between supplier grades.
- Crystalline silica content: Critical for occupational exposure control, grade selection and safety documentation.
- Particle size distribution: Affects powder flow, dusting, blend uniformity, mouthfeel, filter permeability and clarification performance.
- Bulk density: Relevant for dosing accuracy, packaging volume, hopper discharge, blending behaviour and logistics planning.
- Moisture and loss on ignition: Important for caking tendency, dry-blend stability, mineral purity and batch comparison.
- pH: Relevant for ingredient compatibility, filtration streams, dry blends and sensitive flavour or colour systems.
- Oil absorption and water absorption: Useful for carrier applications, flavour systems, fat-containing powders and moisture management.
- Filter permeability: Essential for filter-aid grades used in beverages, oils, syrups or other liquid process streams.
- Acid-insoluble matter and ash profile: Important for mineral identity, purity and process-control comparison.
- Heavy metals and trace elements: Review lead, arsenic, cadmium, mercury and other market-specific impurity limits.
- Fluorine or fluoride limits: May be required in some regulatory or customer specifications for siliceous mineral materials.
- Microbiology: Confirm total plate count, yeast and mould, pathogens and any application-specific microbiological expectations.
- Origin and processing method: Request deposit origin, manufacturing site, natural/calcined/flux-calcined status and production-route information.
- Dietary and customer documents: Confirm allergen, GMO, halal, kosher, vegetarian or vegan status where required by the finished product.
- Packaging and shelf life: Check bag type, liner, net weight, pallet configuration, storage condition and expiry or retest date format.
Regulatory and labelling review
Diatomaceous Earth does not have a single universal food-additive identity that applies automatically to every country, food category, processing-aid use or label declaration. It may be treated differently depending on whether it is used as an anticaking agent, carrier, filtration aid, inert processing aid, animal-feed ingredient or technical processing material. Before commercial use, the buyer should verify additive status in the destination market, the intended food category, maximum permitted level, carry-over rules, processing-aid interpretation, import requirements and finished-product label declaration.
Depending on local rules, finished product labels may need to declare a class name, ingredient name, mineral carrier, anticaking agent, processing aid or market-specific equivalent. In filtration applications, whether the material must appear on the finished-product label depends on local rules, carry-over, residue, use function and customer policy. Regulatory review should be completed before trials are scaled to commercial production.
Quality, storage and handling expectations
Storage
Store in tightly closed original packaging in a clean, dry, cool and well-ventilated area. Protect from moisture, damaged bags, direct sunlight and odour contamination. Humidity control is important because water pickup can affect flowability, caking, filtration behaviour and carrier performance.
Dust control
Powder handling should include local exhaust ventilation, dust-minimising transfer methods and appropriate PPE according to the safety data sheet. Avoid uncontrolled airborne dust, especially where crystalline silica declarations or occupational exposure limits are relevant.
Incoming inspection
At goods receipt, verify product name, grade, batch number, net weight, packaging condition, shelf life, certificate of analysis and label information. Inspect for caking, moisture ingress, torn liners, foreign odour, dust leakage or damaged pallets before release.
Traceability
Batch-level traceability should connect purchase order, supplier lot, certificate of analysis, warehouse receipt, internal material code, process batch, filtration record or finished-product lot. This supports audits, export documentation and recall-readiness programs.
Plant-trial and process-validation guidance
Before full commercial approval, Diatomaceous Earth should be evaluated in pilot or plant-scale trials using the same dry-blend equipment, liquid process stream, filtration system, dosing point, humidity exposure, storage condition and packaging format planned for production. Laboratory screening can be useful, but it may not reveal all flow, dusting, filter-cake, sensory, carry-over or caking effects found in industrial conditions.
- Define the function: Confirm whether the target is anticaking, carrier performance, filtration, clarification, absorption, dusting or process-aid use.
- Select the right grade: Match particle size, permeability, oil absorption, water absorption and crystalline silica profile to the application.
- Test at realistic humidity: Dry blends should be stored under plant and distribution humidity before approval.
- Measure flowability: Check hopper discharge, angle of repose, filling accuracy, bridging, rat-holing and segregation.
- Validate filtration: For liquid systems, test precoat, body feed, pressure rise, clarity, flow rate, filter-cake release and product loss.
- Check sensory impact: Review grittiness, mouthfeel, colour, odour, flavour release, sediment and visual appearance.
- Control dust exposure: Document transfer method, ventilation, PPE, cleaning procedure and crystalline-silica safety review.
Documents to request
For a professional food-manufacturing approval process, buyers should request documentation that supports identity, safety, compliance, traceability and customer claims. Typical document requirements include:
- Product specification or technical data sheet
- Certificate of analysis for the offered batch or representative lot
- Safety data sheet and dust-exposure handling guidance
- Food-grade statement and intended-use statement
- Origin statement, deposit-source information and manufacturing-site declaration
- Natural, calcined or flux-calcined processing-method declaration
- Crystalline silica declaration and relevant occupational-safety information
- Silicon dioxide content, moisture, pH, particle-size distribution and bulk-density information
- Oil absorption, water absorption or filter permeability data where relevant
- Heavy metals, arsenic, lead, fluorine or fluoride limits from the supplier specification
- Allergen statement and cross-contact information
- GMO status statement, if required by the destination market or customer
- Halal, kosher, vegetarian or vegan certificate or declaration, if applicable
- Microbiological limits where required by the application
- Shelf-life, storage, packaging and pallet-configuration details
- Label draft, bag marking and batch-coding format
- Market-specific declarations required by the importing country, retailer or end customer
Commercial sourcing and logistics notes
Diatomaceous Earth is typically purchased by industrial users according to grade, source, particle size, purity, crystalline silica content, filtration performance, documentation package, batch availability, shipment destination, packaging format and cost-in-use performance. When comparing offers, buyers should not evaluate only the unit price. Flow improvement, filter life, product loss, dust control, caking behaviour, safety documentation, regulatory suitability and plant performance can all affect the real commercial value of the material.
For export projects, buyers should confirm HS code guidance with their customs broker, required import permits, original document requirements, shelf-life remaining at dispatch, pallet treatment, dust-control requirements, container loading plan and whether the product requires special protection from humidity during transport.
How to request this product
To receive a more accurate quotation, send the product name, target specification, intended food or processing application, annual or spot quantity, destination country, packaging preference, required delivery term, expected shipment date and requested documents. If you already purchase Diatomaceous Earth, attach your current specification, supplier label, certificate of analysis, particle-size requirement, crystalline silica limit, permeability target or benchmark sample details so alternatives can be compared more accurately.
Minimum inquiry details
- Product name: Diatomaceous Earth / Diatomite / CAS 61790-53-2
- Required grade and target specification
- Function: anticaking, flow aid, carrier, filter aid or processing aid
- Required particle size, permeability or crystalline silica limit, if known
- Quantity per shipment and annual forecast
- Destination country and delivery term
- Preferred packaging size and pallet requirements
- Required certificates and declarations
Helpful technical details
- Application type: powder blend, seasoning, salt, bakery mix, beverage filtration, oil filtration, sugar processing or other system
- Target issue: caking, poor flow, liquid absorption, filtration rate, clarity, dusting or carrier performance
- Current grade, particle size, permeability or use level being used
- Process conditions: dry blending, precoat filtration, body-feed filtration, high humidity, oil phase, water phase or hot process
- Need for food-grade, processing-aid, halal, kosher, vegetarian, vegan, allergen or GMO documentation
- Any regulatory market, customer standard or retailer requirement to be matched
Useful answers
What is Diatomaceous Earth used for in food manufacturing?
Diatomaceous Earth is used in selected food and food-processing applications as an anticaking agent, powder-flow aid, absorbent carrier, mineral carrier, filtration aid or processing aid. It may support dry-blend handling, caking reduction, liquid clarification, oil filtration, sugar processing, carrier systems and process consistency. Exact suitability depends on grade, source, particle size, crystalline silica content, use level, process, label requirements, regulations and supplier documents.
Is Diatomaceous Earth the same as diatomite?
Yes. Diatomaceous Earth is commonly called diatomite, kieselguhr or kieselgur. It is a siliceous mineral material derived from fossilised diatom structures. Food-grade buyers should confirm source, processing method, crystalline silica content, particle size, purity and permitted-use status from supplier documents.
Can all Diatomaceous Earth grades be used in food?
No. Industrial, pool-filter, calcined, flux-calcined, pest-control or technical grades should not be assumed suitable for food applications. Food manufacturers should request food-grade documentation and verify that the exact grade is permitted for the intended use and destination market.
Which applications are most relevant?
Relevant applications may include powdered beverages, seasonings, salt products, spice blends, bakery mixes, premixes, mineral carriers, tableting dusting systems, edible-oil filtration, beverage clarification, sugar processing and selected processing-aid uses, subject to local additive rules.
Which specification points are important?
Important specification points include silicon dioxide content, crystalline silica content, moisture, loss on ignition, pH, particle size distribution, bulk density, oil absorption, water absorption, flowability, acid-insoluble matter, heavy metals, arsenic, lead, fluorine or fluoride, microbiology where relevant, filter-aid permeability, packaging type, shelf life and storage conditions.
Which documents should be requested?
Buyers commonly request a technical data sheet or specification, certificate of analysis, safety data sheet, food-grade statement, origin statement, processing-method declaration, crystalline-silica declaration, heavy-metal limits, allergen statement, GMO statement, halal or kosher documents if required, shelf-life information, storage guidance, label details and packaging configuration.
Is this product permitted in every country?
No. Food additive, processing-aid, carrier and filtration-aid use depends on destination-market rules, food category, use level, carry-over, labelling requirements and buyer responsibility. Regulatory approval should be checked before commercial production.
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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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