Calcium Carbonate E170
Calcium Carbonate is a food-grade mineral ingredient used in selected applications for powder flow improvement, caking reduction, mineral carrying, calcium fortification, white color support, tablet dusting, pH adjustment support and dry-blend handling. It is valued by manufacturers because it combines high calcium content, low water solubility, strong whiteness, broad particle-size options and practical cost-in-use.
Global Food Additives supports dry-mix producers, beverage-powder manufacturers, bakery mix plants, seasoning houses, salt processors, confectionery producers, nutritional-powder brands, tablet manufacturers and ingredient distributors with Calcium Carbonate sourcing, specification comparison, technical document collection, packaging coordination and export-ready quotation support.
Product identity
| Product | Calcium Carbonate |
|---|---|
| Common additive reference | E170 / INS 170 |
| CAS / identity | 471-34-1 |
| Chemical formula | CaCO3 |
| Common forms | Ground Calcium Carbonate, Precipitated Calcium Carbonate, micronized calcium carbonate, granular calcium carbonate |
| Category | Anticaking, Flow & Mineral Carriers |
| Functional class | Anticaking agent / flow aid / mineral carrier / calcium source / white color support / processing aid |
| Typical form | Fine powder, micronized powder, granule, carrier grade, tablet grade or application-specific particle-size grade |
| Commercial focus | Food-grade compliance, CaCO3 assay, particle size, whiteness, low impurity profile, low heavy metals, lot traceability and stable supply |
Application fit
Potential use areas must be checked against destination-market rules, finished-food category, customer specifications and process conditions. Typical technical review areas may include:
- Powdered beverages, instant drink mixes and reconstitution systems
- Seasonings, spice blends, soup powders and savory premixes
- Bakery mixes, self-rising flour, cake mixes and dry baking systems
- Salt products, table salt blends and dry mineral carriers
- Confectionery, chewing gum, tablets and compressed formats
- Nutritional powders, calcium-fortified foods and cereal systems
- Food colors, coating systems and white opacity applications
- Dry-blend carriers for vitamins, flavors, acids and processing aids
Technical function in food systems
Calcium Carbonate provides a combination of mineral, physical and processing functions. As a low-solubility calcium salt, it can increase calcium content while contributing opacity, whiteness, dry-powder body and mineral loading. As a dry-powder ingredient, it can support flow, reduce stickiness, act as a carrier, dilute concentrated actives and improve handling in premix systems. Its alkaline reaction profile also makes it useful in formulas where controlled neutralization or acid balance is required.
Successful use depends strongly on grade selection. Particle size, particle shape, surface area, brightness, bulk density, moisture, oil absorption and impurity profile can change performance in powders, tablets, coatings, beverages, bakery mixes and nutritional systems. A grade that performs well as a tablet filler may not be ideal for a beverage powder, and a grade with excellent whiteness may not provide the best flow or sensory profile in a fortified drink.
Functional benefits to evaluate
- Calcium contribution for fortification and mineral enrichment
- Dry-powder flow improvement and caking reduction
- Carrier function for flavors, acids, sweeteners, colors and vitamins
- White opacity and brightness support in coatings and confectionery
- Bulk and body contribution in tablets, gums and compressed products
- pH neutralization support in acid-containing dry mixes
- Cost-effective mineral filler for selected food applications
- Low water solubility for products requiring suspended mineral particles
Key formulation variables
| Particle size | Fine grades improve smoothness and dispersion; coarser grades may improve flow and reduce dust. |
|---|---|
| Whiteness | Brightness and color tone matter in confectionery, coatings, tablets and white powder systems. |
| Bulk density | Affects dosing, blending, packaging fill volume, tablet compression and segregation risk. |
| Solubility | Calcium Carbonate has low water solubility, so suspension and sediment control are critical in liquids. |
| Acid reaction | It reacts with acids and can release carbon dioxide, affecting pH, gas formation and texture. |
| Mineral taste | High levels may create chalkiness, grittiness, drying sensation or mineral notes. |
| Impurity profile | Heavy metals, acid-insoluble matter, iron and fluoride may be important for sensitive markets. |
Industrial application guidance
Calcium Carbonate should be selected according to the actual process objective. In a dry seasoning, flow and low dusting may matter most. In a fortified beverage powder, particle size, taste and sedimentation are critical. In confectionery tablets, compressibility, whiteness and mouthfeel are important. In bakery systems, pH interaction and leavening balance must be checked. Each application needs a specific grade, document package and validation plan.
Powdered beverages
In powdered drinks, Calcium Carbonate may provide calcium fortification and opacity. Because it is not highly soluble, formulators should validate particle size, reconstitution behavior, sedimentation, mouthfeel, pH, stabilizer compatibility, flavor masking and calcium declaration.
Seasonings and savory premixes
In seasoning blends, Calcium Carbonate can act as a carrier, flow aid and mineral diluent. Buyers should test blending uniformity, particle-size compatibility with salt and spices, dusting, caking, color impact, bulk density and sensory neutrality.
Bakery mixes and flour systems
In bakery mixes, Calcium Carbonate may contribute calcium, flow control and pH adjustment. It should be tested with acids, leavening systems, starches, flour proteins and moisture conditions because acid-carbonate reactions can influence gas release, batter pH, volume and flavor.
Salt products and mineral blends
In table salt blends, mineral systems and dry carriers, Calcium Carbonate may support flow and mineral positioning. Formulators should validate particle size, segregation, humidity resistance, flow through packaging equipment and label declaration.
Confectionery and chewing gum
In confectionery, chewing gum and coating systems, Calcium Carbonate may contribute opacity, whiteness, body and mineral loading. Key tests include brightness, grittiness, particle size, compatibility with acids, coating smoothness and sensory impact.
Tablets and compressed formats
In tablets, chewables and compressed nutrition products, Calcium Carbonate can act as a calcium source and mineral filler. Buyers should evaluate compressibility, flowability, hardness, friability, dusting, disintegration, mouthfeel and active uniformity.
Nutritional powders and cereals
In fortified powders, cereals and dry nutrition products, Calcium Carbonate can deliver high calcium content at practical cost-in-use. The final grade should be selected for blend uniformity, taste, serving-size calcium target, particle size and finished-product claim compliance.
Food colors and coatings
In white coatings, confectionery systems and visual standardization projects, Calcium Carbonate may provide opacity and brightness. Buyers should specify whiteness, color tone, particle size and impurity limits to avoid grayness, specking or undesirable texture.
Ground Calcium Carbonate vs. Precipitated Calcium Carbonate
Food-grade Calcium Carbonate can be supplied as ground mineral material or as precipitated material. Ground Calcium Carbonate is produced by milling selected limestone, marble or other calcium carbonate deposits. Precipitated Calcium Carbonate is produced through controlled chemical precipitation and may offer tighter particle morphology, brightness or particle-size control depending on supplier process. The best choice depends on application, purity requirements, cost-in-use and functional target.
Ground Calcium Carbonate may be preferred when
- Cost-effective mineral loading is the main objective
- A natural mineral origin is acceptable and documented
- Dry blending, carrier function or tablet filling is required
- Particle-size range and whiteness meet the application target
- Supplier impurity and heavy-metal profile meets buyer specification
Precipitated Calcium Carbonate may be preferred when
- Tighter particle morphology or particle-size control is required
- High brightness or specific opacity performance is important
- Controlled surface area or oil absorption is needed
- A more consistent engineered grade is required
- The supplier can support food-grade documentation and regulatory requirements
Calcium fortification and formulation design
Calcium Carbonate is one of the highest-calcium food-grade mineral sources by elemental calcium percentage. This makes it attractive for cereals, powders, tablets, chewables and fortified foods where high calcium delivery and low cost-in-use are important. However, high calcium content does not automatically mean best sensory or process performance. Formulators must balance dosage, particle size, chalkiness, sedimentation, pH, mouthfeel and label rules.
Useful fortification targets
- Calcium-fortified cereal and grain products
- Powdered beverages and instant nutrition mixes
- Chewable tablets, compressed tablets and gummies where suitable
- Bakery mixes and dry premixes requiring calcium contribution
- Meal replacements, protein powders and functional blends
- White confectionery or coating systems requiring opacity and minerals
Validation checks
| Elemental calcium | Confirm calcium percentage and assay basis before setting dosage and label claims. |
|---|---|
| Serving claim | Check minimum and maximum calcium levels for nutrient claims in the destination market. |
| Mouthfeel | Evaluate chalkiness, grittiness, drying sensation and aftertaste at the target level. |
| Sedimentation | Measure mineral settling in liquid and reconstituted products. |
| pH effect | Confirm pH shift in acidified systems, powders and bakery formulas. |
| Bioavailability claims | Avoid unsupported claims unless substantiated by applicable regulatory and scientific standards. |
Specification checklist for buyers
For industrial purchasing, the most valuable comparison is not only the product name. Buyers should compare the supplier specification against the intended application, particle-size requirement, regulatory market, processing conditions and internal quality standard. A strong specification helps QA, R&D, purchasing and regulatory teams confirm suitability before commercial commitment.
Chemical and physical controls
- Identity as Calcium Carbonate / E170 / INS 170
- Assay as CaCO3 and elemental calcium content
- Manufacturing route: ground, precipitated or supplier-specific grade
- Appearance, color tone, whiteness or brightness
- Moisture or loss on drying
- pH under supplier test conditions
- Acid-insoluble matter and insoluble impurities
- Particle size distribution, D50, D90, D97 or mesh range
- Bulk density, tapped density and flowability
- Oil absorption or surface area where relevant
- Caking tendency and dusting behavior for dry blending
- Sensory profile, including chalkiness, grittiness or foreign notes
Purity, safety and compliance checks
- Heavy metals limits according to buyer or regulatory specification
- Lead, arsenic, cadmium and mercury limits where required
- Iron limits where whiteness, color or beverage quality is sensitive
- Fluoride, acid-insoluble matter or other impurity limits where specified
- Microbiological limits for sensitive dry blending or nutritional applications
- Food-grade statement and intended-use declaration
- Batch number, production date, retest date and shelf-life
- SDS classification and safe handling recommendations
- Allergen, GMO, halal, kosher, vegan and irradiation declarations when requested
- Country-of-origin, quarry/source or manufacturing-site traceability information
- Regulatory statement for the destination market where available
Regulatory and label review
Calcium Carbonate is identified as E170 / INS 170 in many markets and may be reviewed as a color, anticaking agent, acidity regulator, carrier, mineral source, processing aid or calcium fortification ingredient depending on the application. However, additive numbering alone does not guarantee permission in every food category or every country.
In the United States, calcium carbonate is listed under 21 CFR 184.1191. The section identifies calcium carbonate as CaCO3 with CAS 471-34-1, references Food Chemicals Codex specifications and states that it is used in food with no limitation other than current good manufacturing practice. Buyers exporting to the United States should still verify the final food category, function, label declaration and customer standard.
For the European Union, Middle East, Africa, Asia-Pacific and Latin American markets, buyers should verify the current additive regulation, fortification regulation and label rules for the exact finished food. Calcium claims, bone-health claims, child-nutrition claims, white-color declarations, clean-label positioning and natural-mineral claims may require separate review.
Process validation considerations
Calcium Carbonate should be validated in the actual manufacturing process because performance depends on particle size, blending sequence, moisture exposure, pH, acid interaction, shear, compression, packaging and storage. The same grade may behave differently in a seasoning, beverage powder, tablet, bakery mix, chewing gum or confectionery coating.
Recommended validation work
- Compare several grades with different particle sizes and bulk densities
- Measure powder flow, angle of repose and packaging-machine performance
- Evaluate blend uniformity and segregation risk in dry premixes
- Check sensory impact, chalkiness and grittiness at target dosage
- Measure pH shift and gas formation in acid-containing systems
- Evaluate sedimentation and reconstitution in powdered beverages
- Test tablet hardness, friability, disintegration and dusting where relevant
- Run accelerated and real-time shelf-life tests under target packaging conditions
- Confirm final label wording, calcium declaration and legal use level before launch
Common process checks
| Weighing accuracy | Mineral claims and functional performance require calibrated scales and controlled batching. |
|---|---|
| Premix method | Preblending with sugar, salt, maltodextrin, flour or carrier can improve distribution. |
| Dust control | Fine grades may require dust extraction, enclosed transfer and operator protection. |
| Moisture exposure | Humidity can affect caking, flow and dry-blend stability. |
| Acid addition | Acid reaction may release carbon dioxide and shift pH; validate formula balance. |
| Finished-product testing | Use retained samples to verify calcium content, texture, pH, sediment, flow and sensory profile. |
Comparison with related mineral ingredients
Calcium Carbonate is commonly compared with calcium citrate, calcium phosphate, calcium lactate, calcium gluconate, tricalcium phosphate, silicon dioxide, magnesium carbonate and other flow aids or mineral carriers. The best choice depends on calcium content, solubility, taste, pH effect, particle size, anticaking efficiency, label preference, cost-in-use, nutritional target and destination-market regulation.
When Calcium Carbonate may be considered
- When high elemental calcium is needed at practical cost-in-use
- When a dry powder needs mineral carrier or flow support
- When whiteness, opacity or tablet body is useful
- When a low-solubility calcium source is acceptable
- When pH neutralization or acid buffering is part of the formula design
- When E170 / INS 170 is permitted in the exact destination-market application
When another ingredient may be better
- When a clear beverage requires a highly soluble calcium source
- When chalkiness or grittiness cannot be controlled
- When sedimentation cannot be managed with particle size or stabilizers
- When the finished product requires acidic rather than alkaline behavior
- When a stronger anticaking agent is required at a lower dosage
- When the label strategy favors citrate, lactate, phosphate or silica-based systems
Quality documentation to request
Documentation quality is often the deciding factor for food additive purchasing. Before confirming an order, request current and batch-specific documents where possible:
- Product specification or technical data sheet showing identity, grade and key limits
- Certificate of analysis for the offered batch or a representative recent lot
- CaCO3 assay, elemental calcium content and particle-size data
- Safety data sheet with handling, storage, PPE and transport information
- Food-grade declaration and intended-use statement
- Country-of-origin, source, manufacturer and traceability statement where available
- Shelf-life, retest period and storage-condition statement
- Allergen, GMO, irradiation, vegan/vegetarian, halal or kosher declarations when required
- Heavy metals, microbiology or impurity declaration according to buyer specification
- Whiteness, brightness, bulk density or oil-absorption data where relevant
- Packaging specification, net weight, gross weight and pallet configuration
- Regulatory statement for the destination market, if available from the supplier
- Sample CoA and pre-shipment document review for new suppliers
- Label draft or package marking information for import and warehouse control
Packaging, storage and logistics
Calcium Carbonate should be handled as a controlled food additive with clean, sealed packaging and traceable lot identification. Although it is generally stable as a dry mineral powder, it should be protected from moisture, contamination, odor pickup and cross-contact. Fine grades may be dusty, while dense mineral grades can affect pallet weight and container loading.
Packaging details to confirm
| Net weight | Confirm available pack sizes such as 20 kg, 25 kg, big bags, drums or supplier-specific formats. |
|---|---|
| Inner liner | Request food-compatible liner protection for moisture and contamination control. |
| Seal integrity | Confirm closure method, tamper evidence and protection against powder leakage. |
| Palletization | Ask for bags or drums per pallet, pallet dimensions, stretch wrapping and export pallet treatment. |
| Labeling | Confirm product name, grade, particle size, lot number, net weight, origin, shelf-life and handling marks. |
| Container loading | Check maximum payload, pallet weight, humidity protection and segregation from incompatible materials. |
Storage recommendations
- Keep containers tightly closed when not in use
- Store in a dry, cool and well-ventilated warehouse
- Protect from water, humidity, condensation and direct sunlight
- Keep away from strong odors, acids and non-food chemicals
- Prevent dust generation during weighing, charging and transfer
- Use first-expiry, first-out stock rotation
- Maintain lot traceability from receipt to production batch
- Segregate food-grade Calcium Carbonate from industrial or technical grades
Industrial purchasing notes
When sourcing Calcium Carbonate, procurement teams should define the technical and commercial target before requesting offers. A clear inquiry improves supplier matching, reduces document delays and helps avoid comparing non-equivalent grades. The most useful inquiry normally includes additive identity, E/INS number, target specification, particle size, assay, whiteness, annual demand, first-order quantity, destination country, delivery term, packaging preference, required certifications and any buyer-specific restricted-substance limits.
For manufacturers using automated dosing, the physical grade is especially important. Particle size, dusting tendency, bulk density, flowability, oil absorption and caking tendency can affect weighing accuracy, dry blending, powder transfer, tablet compression, beverage reconstitution and finished-product consistency. For export projects, document consistency between invoice, label, CoA, packing list and regulatory statement should be checked before shipment.
Supplier qualification questions
Technical questions
- Is the supplied grade ground, precipitated, micronized, granular or tablet grade?
- Which food-grade specification standard does the material follow?
- What is the CaCO3 assay and elemental calcium content?
- Can particle size distribution, D50 and D97 be confirmed?
- Can whiteness, brightness, bulk density and oil absorption be provided?
- Can the supplier provide representative and batch-specific certificates of analysis?
- Are heavy metals, acid-insoluble matter, iron and microbiology routinely controlled?
- Can samples be supplied for powder flow, sensory, tablet or beverage trials?
Commercial questions
- What is the minimum order quantity and standard lead time?
- Which packaging formats are available for export?
- Can the supplier support annual contracts or scheduled shipments?
- Which incoterms, ports and payment terms are available?
- Can documents be reviewed before shipment?
- Can the supplier provide market-specific declarations when required?
- Can the supplier support manufacturer, distributor or private-label documentation needs?
How to request this product
Send the product name, target grade or reference specification, particle-size requirement, assay target, quantity, destination country, delivery term, packaging preference, expected shipment date and required documents. If you already purchase Calcium Carbonate, attach or describe your existing specification, label, certificate of analysis, particle-size target, sensory requirement, fortification target or approved supplier standard so supplier options can be compared more accurately.
Useful answers
What is Calcium Carbonate used for in food manufacturing?
Calcium Carbonate E170 is used as an anticaking agent, flow aid, mineral carrier, calcium source, white color support, tablet excipient, dry-blend processing aid and pH adjustment support in selected food applications. Exact suitability depends on grade, particle size, process, dosage, regulations and supplier documents.
What is the difference between ground and precipitated Calcium Carbonate?
Ground Calcium Carbonate is produced by milling selected natural mineral sources, while Precipitated Calcium Carbonate is produced through controlled precipitation. They can differ in particle size, purity, morphology, whiteness, bulk density, surface area and cost-in-use.
Can Calcium Carbonate be used for calcium fortification?
Yes. Calcium Carbonate is often reviewed as a high-calcium mineral source. Buyers should confirm elemental calcium content, particle size, sensory impact, pH effect, nutrition-claim rules and destination-market regulations before commercial use.
Is Calcium Carbonate soluble in water?
Calcium Carbonate has very low water solubility. For beverages and liquid systems, formulators should validate particle size, dispersion method, stabilizer system, sedimentation, mouthfeel, chalkiness, pH and shelf-life behavior in the actual product.
Can Calcium Carbonate react with acids?
Yes. Calcium Carbonate reacts with acids and can release carbon dioxide. This may be useful or undesirable depending on the formula, so acid systems, pH shift, gas release and packaging pressure should be validated.
Which foods commonly require Calcium Carbonate review?
Buyers often review Calcium Carbonate for powdered beverages, seasonings, premixes, bakery mixes, salt products, confectionery, chewing gum, tablets, nutritional powders, cereals and calcium-fortified foods. The exact permission and label declaration must be verified for the destination market.
Is Calcium Carbonate permitted in every country?
No. Food additive use and mineral fortification depend on destination-market rules, food category, maximum and minimum nutrient levels, nutrition-claim rules, label requirements and buyer responsibility. Buyers should verify final regulatory status before use.
Which documents should be requested?
Buyers commonly request a product specification, technical data sheet, certificate of analysis, calcium assay, safety data sheet, origin statement, shelf-life information, storage conditions, packaging details, label information and destination-market declarations when required.
What should be checked on the certificate of analysis?
Check lot number, production date, test date, identity, CaCO3 assay, elemental calcium content, appearance, moisture or loss on drying, pH, acid-insoluble matter, particle size, heavy metals, microbiology where specified and whether the certificate matches the supplied batch and purchase specification.
Can Global Food Additives source Calcium Carbonate?
Global Food Additives can review sourcing options according to target grade, particle size, assay, quantity, destination, packaging, documentation, shipment schedule and regulatory expectations. Availability depends on supplier stock, origin, certification and buyer requirements.
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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