Calcium Gluconate
Calcium Gluconate, identified as E578 in many markets, is a food-grade calcium salt of gluconic acid used by manufacturers for acidity regulation, buffering, calcium addition, firming, mineral fortification, texture support and process-stability applications where permitted. It is often evaluated when a mild-tasting calcium source is preferred over more bitter or highly reactive calcium salts.
Industrial purchasing should focus on assay, elemental calcium content, hydrate form, solubility, dissolution rate, particle size, powder flow, sensory impact, pH behaviour, impurity limits, microbiological profile, packaging protection and destination-market documentation. Global Food Additives supports food manufacturers with supplier screening, specification review, COA collection, sample coordination and export-ready quotation communication.
Product identity
| Product | Calcium Gluconate |
|---|---|
| Common names | Calcium Gluconate E578, Calcium Salt of Gluconic Acid, Calcium D-Gluconate, Gluconic Acid Calcium Salt |
| Category | Acidulants & Acidity Regulators |
| Function | Acidity regulator / buffering ingredient / firming agent / calcium source / mineral fortification ingredient |
| E / INS number | E578 |
| CAS / identity | 299-28-5 |
| Chemical identity | Calcium salt of gluconic acid; exact hydrate form and assay should be confirmed by supplier documentation |
| Typical form | Powder, crystal, granule, fine powder, premix-ready grade, direct-blend grade or solution grade |
| Typical appearance | White to off-white crystalline powder or granule depending on grade, particle size and moisture |
| Solubility profile | Water-soluble to slowly soluble depending on grade, particle size, temperature, agitation and food matrix |
| Key performance role | Calcium delivery, pH buffering, firming, mineral enrichment, mild calcium taste profile and formulation support |
Application fit
Calcium Gluconate is selected where calcium functionality, mild sensory performance and controlled food-grade documentation are required. Potential use areas may include:
- Beverages, powdered drinks, functional drinks and calcium-enriched drink systems
- Confectionery, gummies, gels, jellies, fillings and panned products
- Sauces, dressings, condiments, marinades and acidic food systems
- Dairy systems, dairy desserts, fermented dairy concepts and dairy-style products
- Fruit preparations, fresh-cut fruits and vegetable firming systems
- Nutrition powders, meal replacements, sachets and vitamin-mineral premixes
- Tablets, capsules, gummies and supplement-adjacent food formats where permitted
- Specialty food applications needing calcium addition with moderate flavour impact
Technical performance overview
Calcium Gluconate supplies calcium in an organic gluconate salt form. It is commonly evaluated when manufacturers need calcium contribution with better sensory acceptance than some highly bitter calcium salts. Its functionality may include calcium fortification, firming in pectin-containing systems, pH buffering, acidity regulation, mineral balance and formulation support.
Because Calcium Gluconate generally delivers less elemental calcium per kilogram than some concentrated inorganic calcium salts, cost-in-use should be calculated from usable calcium contribution rather than raw material price alone. Application teams should also consider dissolution time, final pH, mineral taste, sediment, haze, interaction with acids, proteins, hydrocolloids, phosphates, citrates and the intended nutrition-label target.
Key formulation variables
| Elemental calcium content | Determines fortification efficiency, use level and cost-in-use. Confirm calcium contribution from the exact supplier grade. |
|---|---|
| Assay basis | Assay may be reported on an as-is, dried or hydrate-specific basis. This must be clarified before dosage approval. |
| Hydrate form | Hydrate form can affect molecular weight, calcium contribution, moisture, flowability, dissolution and price comparison. |
| Solubility and dissolution | Critical for beverages and liquid systems. Temperature, agitation, particle size and mineral system affect dissolution speed. |
| Sensory profile | Generally milder than some calcium salts, but high dosage can still create mineral, chalky or bitter notes. |
| pH behaviour | Calcium Gluconate can contribute buffering and acidity regulation, but final pH depends on the full acid-salt system. |
| Texture interaction | Calcium ions can interact with pectin, alginate, proteins and other hydrocolloids, affecting firmness, gel strength or stability. |
| Powder handling | Particle size, bulk density, dusting, moisture and flowability affect dosing, blending, packaging and segregation risk. |
Industrial advantages
- Useful calcium source for selected fortified foods and beverages
- Milder taste profile than some highly reactive or bitter calcium salts
- Can support firming in fruit, vegetable and gel systems where calcium interaction is desired
- Can contribute to acidity regulation and buffering in suitable formulations
- Available as powder, crystal, granule or solution grade depending on supplier
- Can be used in premixes and nutritional systems when particle size and flow are controlled
- Suitable for applications requiring clean calcium-salt documentation and traceable food-grade supply
- May be paired with other calcium salts when higher calcium delivery or faster solubility is needed
Calcium delivery and dosage planning
For calcium enrichment projects, the formulation team should define the finished-product calcium target before selecting the grade. Calcium Gluconate dosage should be calculated from elemental calcium, assay, hydrate form, serving size, processing loss, storage loss, analytical tolerance and label-claim rules. Finished-product testing is important because minerals may settle, interact with proteins or hydrocolloids, or be affected by filtration and processing steps.
| Planning area | Why it matters | What to request or confirm |
|---|---|---|
| Elemental calcium value | Required for nutrition-label and calcium-claim calculations | Calcium content, conversion factor and COA value from the exact batch |
| Assay and purity | Controls raw material potency, dosage accuracy and quality approval | Assay range, method of analysis and as-is or dried-basis reporting |
| Hydrate form | Affects calcium contribution per kilogram and supplier comparison | Monohydrate, anhydrous or other specified grade with identity confirmation |
| Target serving value | Links raw-material use level to nutrition panel and claim compliance | mg calcium per serving, local reference value, claim threshold and rounding rule |
| Process retention | Minerals may be lost through precipitation, sedimentation or filtration | Heat process, pH, filtration, homogenisation, sediment control and finished-product calcium assay |
| Sensory limit | High calcium dosage may affect taste, mouthfeel and consumer acceptance | Sensory threshold, flavour masking, sweetness, acidity and mouthfeel trial data |
Firming and texture functionality
Calcium Gluconate may be evaluated as a firming agent because calcium ions can interact with pectin and other negatively charged matrix components. In fruit, vegetable, gel and confectionery systems, this can help improve firmness, reduce tissue softening, support gel strength or stabilise texture. Final effect depends on pH, soluble solids, pectin type, calcium dose, contact time, temperature and competing calcium-binding ingredients such as citrate, phosphate or alginate.
Recommended evaluation steps
- 1. Define the target function: calcium fortification, firming, buffering, pH adjustment, mineral balance, gel support or premix use.
- 2. Confirm grade identity: request assay, hydrate form, calcium content, solubility, particle size, pH and COA values.
- 3. Check the food matrix: share pH, Brix, proteins, hydrocolloids, acids, phosphates, citrates, heat process and storage conditions.
- 4. Run bench trials: evaluate dissolution, clarity, sediment, flavour, firmness, gel strength, pH shift and shelf-life stability.
- 5. Validate scale-up: test addition order, mixing time, filtration, dosing equipment, batch uniformity and package stability.
- 6. Confirm compliance: verify food category, use level, nutrient-source status, label name, calcium claim and destination-market rules.
Where extra caution is needed
- Clear beverages where incomplete dissolution, haze or sediment may be visible
- High-calcium products where mineral taste or chalky mouthfeel may appear
- Protein beverages and dairy systems where calcium can affect stability or viscosity
- High-citrate or high-phosphate formulas where calcium may complex or precipitate
- Gels or fruit systems where too much calcium can create tough, brittle or uneven texture
- Low-moisture powders where particle-size mismatch may cause segregation
- Infant, medical or special-nutrition products requiring strict nutrient-source approval
Typical industrial application areas
| Application | Technical objective | Purchasing notes |
|---|---|---|
| Beverages and powdered drinks | Calcium addition, mineral balance and pH support | Check solubility, clarity, pH, sediment, flavour masking, heat process, oxygen exposure and package stability. |
| Confectionery and gummies | Calcium delivery, gel support and texture control | Evaluate pectin or gelatin interaction, cook temperature, Brix, water activity, pH, taste and finished calcium assay. |
| Fruit and vegetable preparations | Firming, texture retention and calcium interaction with pectin | Review dip concentration, contact time, pH, calcium uptake, sensory impact, washing and shelf-life texture. |
| Sauces and dressings | Buffering, mineral contribution and acidity balance | Check acid system, emulsifier system, gum or starch interaction, heat process, salt level and final pH. |
| Dairy and dairy-style systems | Calcium enrichment and mineral balance in protein-rich matrices | Evaluate protein stability, phosphate/citrate balance, fermentation impact, viscosity, heat treatment and storage conditions. |
| Nutrition powders and premixes | Calcium source for fortified powders and mineral premixes | Review particle size, bulk density, flowability, blend uniformity, caking risk and vitamin-mineral compatibility. |
| Tablets, sachets and supplement-style formats | Calcium delivery in portioned nutrition products where permitted | Check compressibility, flow, taste, dosage uniformity, label rules and compendial documentation where required. |
| Specialty gels and alginate systems | Controlled calcium contribution to gel structure or texture | Evaluate calcium release, alginate or pectin type, pH, contact time, gel strength and sensory result. |
Specification checklist for buyers
For industrial purchasing, Calcium Gluconate should be evaluated by usable calcium delivery, solubility, taste impact, regulatory support and physical handling. A lower-priced grade may be less economical if it has lower assay, unsuitable hydrate form, poor dissolution, weak documentation, excessive moisture or particle size that causes segregation or grittiness.
Technical specification points
- Assay and identity confirmation
- Hydrate form and CAS confirmation where applicable
- Elemental calcium content and conversion basis
- Gluconate content and related-substance profile
- pH of solution and buffering behaviour
- Solubility, dissolution time and insoluble matter
- Particle size distribution, sieve residue and dusting tendency
- Bulk density, tapped density and flowability
- Moisture, loss on drying and water activity where relevant
- Colour, odour, taste and sensory neutrality
- Heavy metals such as lead, arsenic, mercury and cadmium according to market requirements
- Microbiological specification and pathogen absence statement where relevant
- Shelf life, storage temperature and opened-pack handling instructions
Commercial comparison points
- Minimum order quantity and sample availability
- Standard grade: fine powder, crystal, granule, direct-blend, solution or premix-ready grade
- Standard packaging size, liner type, bag, carton, drum, pail or big-bag configuration
- Food-grade, FCC, USP, EP, JECFA, EU or customer-specific compliance where required
- Batch size, lead time and annual supply continuity
- Halal, Kosher, allergen, GMO, vegan and gluten statements where required
- Suitability for calcium claims, beverage systems, firming applications or premixes
- Destination-market regulatory declaration and label support documents
Quality, safety and compliance control
Food-grade Calcium Gluconate should be purchased with a complete specification and batch COA. Quality teams should review assay, identity, calcium content, hydrate form, purity, heavy metals, microbiological limits, sensory profile, solubility, packaging integrity and shelf-life conditions. For nutrition applications, finished-product testing should confirm the declared calcium level and verify that calcium remains evenly distributed through shelf life.
For sensitive applications such as infant foods, medical foods, clinical nutrition, export premixes or customer-audited nutrition products, buyers may require compendial compliance, full traceability, residual solvent declarations, elemental impurity data, allergen controls, food-safety certification and evidence that the exact grade is suitable for the intended market and product category.
Processing and handling notes
Calcium Gluconate should be stored in sealed original packaging in a cool, dry and clean warehouse. Keep bags or drums tightly closed after opening to protect powder flow and prevent moisture pick-up. In dry blends, pre-blending with a suitable carrier can improve uniformity. In liquid systems, add under sufficient agitation and allow full dissolution before final pH adjustment, filtration, heat treatment or filling.
| Processing factor | Industrial importance | What to confirm |
|---|---|---|
| Dissolution method | Controls clarity, sediment, mineral distribution and process efficiency | Water temperature, stock concentration, agitation, addition rate and filtration requirement |
| Addition order | Prevents precipitation, pH drift or unwanted texture changes | Sequence relative to acids, citrate, phosphate, proteins, gums, pectin, alginate and preservatives |
| Dry blending | Controls dosage uniformity and serving-to-serving calcium consistency | Carrier, preblend ratio, blend time, particle-size match, bulk density and segregation testing |
| Heat treatment | Can affect solubility, protein stability, haze and texture | Pasteurisation, baking, hot-fill, UHT, retort, spray drying, cooling rate and shelf-life conditions |
| Packaging barrier | Protects powder flow, sensory quality and finished-product stability | Moisture barrier, liner quality, desiccant need, warehouse humidity and opened-pack handling |
Regulatory and label review notes
Calcium Gluconate is identified as E578 in many markets, but permitted use depends on the destination country, food category, use level, technological function and finished-product label. It may be reviewed as an acidity regulator, firming agent, calcium source, mineral ingredient or formulation-support ingredient depending on the market and application.
For fortified foods, buyers should confirm whether Calcium Gluconate is an approved nutrient source for the target product category and whether calcium claims are allowed at the proposed level. The final label may need to declare Calcium Gluconate, calcium gluconate, E578, calcium, a calcium salt of gluconic acid or another market-specific name. The buyer is responsible for verifying food additive status, nutrient-source status, maximum use level, label declaration and claim compliance before commercial launch.
Industrial troubleshooting guide
| Observed issue | Possible cause | Corrective action to test |
|---|---|---|
| Cloudiness or sediment in beverage | Incomplete dissolution, high dosage, pH shift, calcium interaction with citrate, phosphate or proteins | Improve dissolution, change addition order, reduce concentration, adjust pH, use chelation strategy or test blended calcium system. |
| Mineral or chalky taste | High calcium dosage, insufficient flavour masking, low sweetness or unsuitable acidity | Reduce dose if permitted, split calcium sources, adjust sweetness/acidity, improve flavour masking and validate sensory shelf life. |
| Weak firming effect | Insufficient available calcium, high citrate/phosphate, wrong pH, short contact time or unsuitable pectin system | Increase validated dose, adjust pH, extend contact time, reduce chelators and compare alternative calcium sources. |
| Texture becomes too firm or brittle | Excess calcium, uneven calcium distribution or over-crosslinking of pectin/alginate system | Lower dosage, improve mixing, change addition method and optimise gel system in pilot trials. |
| Premix segregation | Particle-size or density mismatch between Calcium Gluconate and carrier system | Use premix dilution, select granulated grade, match particle size and validate top/middle/bottom samples. |
| Finished calcium level below target | Wrong conversion basis, low assay, filtration loss, sedimentation or sampling error | Confirm elemental calcium basis, review COA, improve mixing, validate sampling and test finished-product recovery. |
| Powder cakes or loses flow | Moisture exposure, damaged packaging, fine particle size or humid warehouse | Improve moisture-barrier packaging, use granular grade, control humidity and reseal opened packs quickly. |
Documents to request
A complete Calcium Gluconate purchasing file should support procurement, R&D, quality assurance, regulatory, production and customer-audit teams. Depending on application and destination market, buyers commonly request:
- Product specification or technical data sheet
- Certificate of analysis for available batch or lot
- Safety data sheet where applicable
- Food-grade declaration and intended-use statement
- Assay, identification, hydrate form and CAS confirmation
- Elemental calcium content and conversion basis
- pH, solubility, dissolution time and insoluble matter data
- Particle size, moisture, bulk density, tapped density and flowability information
- Heavy metals, residual impurities and contaminant declarations
- Microbiological specification and pathogen absence statement where relevant
- Compendial compliance statement where required, such as FCC, USP, EP, JECFA or customer-specific standard
- Allergen statement, GMO statement, gluten statement and vegan suitability statement
- Halal and Kosher certificates where required
- Origin, manufacturer, shelf-life and storage information
- Label declaration guidance and market-specific regulatory statement
- Packaging details, pallet configuration and transport recommendations
Packaging and logistics
Calcium Gluconate is commonly supplied in multi-layer paper bags, PE-lined bags, cartons, fibre drums, plastic drums, pails or sealed containers depending on grade and order size. Packaging should protect against moisture, contamination and powder leakage. Fine powder grades may require dust-control precautions during weighing, while granules or premix-ready grades may support improved flow and reduced segregation.
For export shipments, buyers should confirm net weight, gross weight, pallet dimensions, container loading, shelf life remaining at dispatch, storage temperature, humidity protection, customs classification and whether the destination market requires any special import document. Warehouse teams should store the ingredient in sealed original packaging until use and avoid exposure to water, steam, strong odours and incompatible chemicals.
How to request this product
Send the product name, target grade or reference specification, required assay, calcium target, physical form, quantity, destination country, packaging preference, expected shipment date and required documents. If you already purchase Calcium Gluconate, attach or describe your existing specification, label, certificate of analysis, application, use level, calcium target and finished-product market so supplier options can be compared more accurately.
Useful answers
What is Calcium Gluconate used for in food manufacturing?
Calcium Gluconate is typically discussed for calcium addition, acidity regulation, pH buffering, firming, mineral fortification, flavour balance and process stability. Exact suitability depends on grade, application, process, regulations and supplier documents.
Is Calcium Gluconate a calcium source?
Yes. Calcium Gluconate is a calcium salt of gluconic acid and may be used as a calcium source where permitted. Buyers should calculate dosage from elemental calcium content, assay, hydrate form, serving size and destination-market rules.
Is Calcium Gluconate used as a firming agent?
It may be used as a firming ingredient in suitable fruit, vegetable and gel systems where calcium interaction is desired. Firming performance depends on pH, calcium dose, pectin or gel system, contact time and process conditions.
Is Calcium Gluconate soluble in water?
Calcium Gluconate is water-soluble to slowly soluble depending on grade, particle size, temperature and agitation. Beverage and liquid applications should be tested for dissolution time, clarity, sediment and shelf-life stability.
Why choose Calcium Gluconate instead of another calcium salt?
Calcium Gluconate may be selected when a milder taste profile, gluconate salt identity, calcium delivery or firming functionality is preferred. However, other calcium salts may provide higher calcium concentration or faster solubility, so cost-in-use should be compared in the actual application.
Which specification parameters matter most?
Important parameters include assay, elemental calcium content, hydrate form, pH, solubility, dissolution rate, moisture, particle size, bulk density, flowability, sensory profile, heavy metals, microbiology, shelf life and storage requirements.
Can Global Food Additives source Calcium Gluconate?
Global Food Additives can review sourcing options for Calcium Gluconate according to target specification, assay, physical form, calcium target, quantity, destination, packaging preference, delivery term and required documentation.
Is this product permitted in every country?
No. Food additive use, nutrient-source status, food category permissions, maximum levels, label declaration and calcium claims depend on destination-market rules, supplier documentation 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. For Calcium Gluconate, please also include application, calcium-content target, required physical form, use level, pH target, solubility requirement, label claim target and any special nutrition-product requirements. Our team will review your inquiry and respond from orders@foodgradeadditives.com.
Your message has been received. You will be redirected to the home page.