Food grade silicon dioxide supplier
State whether the requirement is an anticaking agent, carrier, adsorbent or filtration grade, because physical properties differ.
Food grade ingredient · Anticaking agent, carrier and filtration aid · E551
Food Grade Silicon Dioxide
Food grade silicon dioxide, also called amorphous silica, is selected for anticaking, adsorption, carrier and filtration performance in suitable food processes.
- CAS number
- 7631-86-9
- Food additive
- INS 551
- Identity
- SiO2 / amorphous silica
- MOQ
- 500 kg
Share the application, critical limits, test methods, quantity, packing and destination.
Qualification scopeKosher, Halal and ISO documents on request
Reference packing15 kg or 10 kg kraft paper bag
Container loading15 kg: 7.5-8.1 MT; 10 kg: 5 MT / 20GP, without pallets
Batch evidenceSpecification and COA on request
Direct product answer
What is food grade Silicon Dioxide?
Food grade silicon dioxide is synthetic amorphous silica identified as INS 551. Grade choice depends on manufacturing form, surface area, pore volume, oil absorption, particle size, bulk density and the intended food-processing function.
Commercial suitability depends on the exact grade, source, test method, intended function and destination-market rules. The current signed specification and batch COA govern each transaction.
Buyer-intent guide
How to source food grade Silicon Dioxide in bulk
Use these qualification points when comparing a China supplier, manufacturer source, distributor offer, bulk quote or sample.
Silica for beer filtration
Prioritize high surface area, pore volume, particle-size distribution and filtration trials with the actual beverage process.
Silicon dioxide for supplements
Specify flowability, oil absorption, bulk density, tablet or powder process and contaminant limits.
Bulk E551 powder procurement
Confirm 10 kg or 15 kg bags, pallets, 20GP loading, dust controls and current food-grade documentation.
Application screening
Common food grade Silicon Dioxide applications
These are formulation areas rather than universal approvals or dosage recommendations. Confirm legal use and performance in the complete finished food.
Powder anticaking
Improves free flow in compatible dry ingredients, seasonings and powdered mixes after dosage trials.
Dietary supplements
Acts as a flow aid, adsorbent or carrier in selected powder and tablet processes.
Beer filtration
High-surface-area grades may support filtration or clarification performance after plant trials.
Beverage processing
Can be evaluated as an adsorbent or process aid where permitted and technically appropriate.
Dairy and confectionery powders
Helps manage moisture-related flow and caking in compatible dry systems.
Flavor and active carriers
Porous grades can carry liquids or sensitive ingredients; verify loading and release behavior.
Supplied technical data
Food grade Silicon Dioxide reference specification
The table reproduces the supplied attachment for procurement screening. It is not a batch COA or a statement of universal regulatory limits.
| Test item | Beer Filtration Grade | Dietary Supplement Grade |
|---|---|---|
| Silicon dioxide after ignition | ≥96% | ≥96% |
| Loss on drying | ≤7% | ≤7% |
| Loss on ignition | ≤8.5% | ≤8.5% |
| Lead (as Pb) | ≤5 mg/kg | ≤5 mg/kg |
| Heavy metals (as Pb) | ≤30 mg/kg | ≤30 mg/kg |
| Arsenic (as As) | ≤3 mg/kg | ≤3 mg/kg |
| Soluble salts | ≤4% | ≤4% |
| Bulk density | <0.3 g/mL | <0.3 g/mL |
| Surface area | ≥400 m²/g | 190-260 m²/g |
| Oil absorption value | Not stated | ≥2.0 mL/g |
| Average particle size | 8-20 μm | 10-20 μm |
| Pore volume | 0.9-1.6 mL/g | Not stated |
| pH | 4.5-9 | 6-8 |
| Iron content | 25 mg/kg | Not stated |
Specification note: The attachment calls the product “Silica Dioxide”; the standard chemical name is silicon dioxide, also called silica. It lists iron content as “25 mg/kg” without a ≤ or target symbol, so this value is reproduced without interpreting it as a maximum. Confirm silica form, manufacturing process, assay basis and every physical-property method before purchase.
Technical selection
Questions to resolve before approving Silicon Dioxide
Silica form
Confirm precipitated, gel, fumed or other amorphous form; food suitability cannot be inferred from the name alone.
Surface structure
Surface area, pore volume and oil absorption drive adsorption and carrier behavior.
Process fit
Match particle size, dusting, bulk density and filtration pressure to the plant equipment.
Regulatory scope
Verify food-additive or processing-aid status, permitted use and residual controls in the destination market.
Qualification support
Documents and evidence to request
Product documents
Request the current signed specification or TDS, SDS, test methods and representative or batch COA.
Food qualification
Verify applicable Kosher, Halal, ISO and food-safety documents for the exact grade, source and manufacturing site.
Independent reference
Review the FAO/JECFA silicon dioxide specification for identity context, then apply destination-market rules separately.
Storage and handling
Protect Silicon Dioxide in storage
- EnvironmentStore sealed in a cool, dry and ventilated area away from direct sunlight and heat; the attachment advises below 30°C where specified.
- MoistureProtect bags or drums from rain, humidity, caking and contamination.
- ControlsKeep original packaging intact and follow the current SDS and site hygiene procedures.
Buyer questions
Food grade Silicon Dioxide FAQ
What is food grade Silicon Dioxide used for?
Silicon Dioxide is used in selected food formulations for anticaking agent, carrier and filtration aid functions. Suitability, legal use and dosage must be confirmed for the exact finished food and destination market.
What are the CAS and food additive numbers for Silicon Dioxide?
Silicon Dioxide is identified by CAS 7631-86-9 and INS 551. Confirm the exact supplied grade and current market rules.
What is the minimum order quantity for Silicon Dioxide?
The supplied reference minimum order quantity is 500 kg. Sample, trial and commercial availability should be confirmed for the selected grade.
How is Silicon Dioxide packed?
The supplied reference packing is 15 kg or 10 kg kraft paper bag. Confirm liner, pallet, marks and container loading in the quotation.
What should be included in a Silicon Dioxide RFQ?
Provide the food application, target specification and test methods, quantity, particle or grade preference, destination, pallet requirements, certificates and requested delivery date.
Last reviewed 2026-07-25 by Bespring Chemical technical and export team.
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Specification-led sourcing
Request a food grade Silicon Dioxide quote
Share the application, target grade and limits, quantity, packing, destination and required documents for a relevant bulk-supply proposal.