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Shaanxi Kaishi Biotechnology Co., Ltd
$8
1-199 Kilogram
$6
200-499 Kilogram
$5
≥500 Kilogram
Product Description
Calcium citrate is an organic calcium salt of citric acid used primarily as a calcium source in nutritional supplements, fortified foods, and formulated nutrition products. Its relatively high calcium content, neutral-to-mildly acidic profile, and established food-use status make it a practical mineral ingredient for B2B formulation.
Calcium citrate is a tricalcium salt of citric acid and is commonly supplied as an anhydrous form or calcium citrate tetrahydrate. The tetrahydrate form has the molecular formula C12H18Ca3O18 and a molecular weight of 570.5 g/mol, while anhydrous tricalcium citrate is represented by C12H10Ca3O14 with a molecular weight of 498.4 g/mol.
As a nutritional ingredient and calcium fortifier, calcium citrate is used in dietary supplements, mineral blends, fortified foods, beverage powders, and other formulated nutrition products. It is also recognized as a calcium salt used in food applications under relevant food standards.
Calcium citrate is formed from calcium and citric acid and belongs to the citrate salts used as nutritional calcium sources. The compound is commonly identified as tricalcium citrate or tricalcium dicitrate. Commercial material may differ in hydration state, assay specification, particle characteristics, and compendial grade, so buyers should match the specification to the intended formulation.
| Item | Specification |
|---|---|
| Product Name | Calcium Citrate |
| Product Category | Nutritional Ingredient / Calcium Fortifier / Food Additive |
| CAS Number | 813-94-5 for tricalcium citrate; 5785-44-4 for calcium citrate tetrahydrate |
| Molecular Formula | C12H10Ca3O14 for anhydrous tricalcium citrate; C12H18Ca3O18 for tetrahydrate |
| Molecular Weight | 498.4 g/mol anhydrous; 570.5 g/mol tetrahydrate |
| Appearance | White to off-white crystalline powder |
| Assay / Purity | Common commercial specifications include approximately 97% to 99% calcium citrate; USP calcium citrate tetrahydrate is commonly specified within a 97.5% to 100.5% range |
| Calcium Content | Approximately 21.1% elemental calcium for the tetrahydrate form; approximately 24.1% for anhydrous tricalcium citrate |
| Test Method | Compendial titrimetric assay and physicochemical identification; calcium content commonly determined by complexometric titration |
| Grade Options | Food grade, nutritional grade, compendial-oriented grades, and customized specifications |
| Particle Size | Standard powder or customized particle size according to formulation and processing requirements |
| Moisture | Controlled according to the agreed specification and hydration state |
| Shelf Life | Typically 24 months under recommended storage conditions |
| Storage | Store in a cool, dry place in a tightly closed package and protect from moisture, heat, and direct sunlight |
| Packaging | Commonly 1 kg or 5 kg aluminum foil bags and 25 kg fiber drums; customized packaging available |
Calcium citrate is used as a calcium source in tablets, capsules, powder blends, sachets, and other nutritional supplement formats.
It can be used as a calcium fortifier in selected food formulations where calcium salts are required. Relevant application limits, purity requirements, and labeling rules should be reviewed for the target market and product category.
Calcium citrate can be combined with other mineral ingredients in premixes and nutritional formulations where the desired elemental calcium contribution and physical processing characteristics are compatible.
Its powder form makes calcium citrate suitable for dry blends, nutrition powders, and other formulations requiring a solid calcium ingredient.
The most important specification decision for calcium citrate procurement is often the relationship between hydration state, assay basis, and elemental calcium content. Buyers should not compare two calcium citrate quotations by percentage assay alone when one material is tetrahydrate and the other is anhydrous.
| Specification Consideration | Tetrahydrate Calcium Citrate | Anhydrous Calcium Citrate |
|---|---|---|
| Typical Formula | C12H18Ca3O18 | C12H10Ca3O14 |
| Molecular Weight | 570.5 g/mol | 498.4 g/mol |
| Approximate Elemental Calcium | 21.1% | 24.1% |
| Procurement Focus | Confirm hydration state and elemental calcium specification | Confirm anhydrous basis and elemental calcium specification |
For a finished product with a defined elemental calcium target, formulation calculations should be based on the actual calcium content and the supplier's agreed specification rather than simply the nominal calcium citrate assay. This helps avoid under- or over-delivery of elemental calcium when switching between hydration states or suppliers.
Standard bulk packaging commonly includes 1 kg or 5 kg aluminum foil bags for smaller quantities and 25 kg fiber drums for larger-volume procurement. Packaging can be customized according to transportation, storage, filling, and finished-product manufacturing requirements.
Calcium citrate can be incorporated into customized nutritional formulations and finished products. Available customization may include dosage-form development, ingredient blending, private-label packaging, labeling, and finished-product manufacturing. Particle characteristics and packaging configurations can be adjusted to suit the intended processing route.
For commercial procurement, each batch should be evaluated against the agreed specification and applicable food or nutritional ingredient requirements. Typical quality-control checkpoints include:
Third-party testing and relevant certifications can be available according to the product specification and target market. Final regulatory and labeling requirements should be reviewed against the destination market before commercialization.
Start with the required elemental calcium contribution in the finished formula. Tetrahydrate contains approximately 21.1% elemental calcium by theoretical composition, while anhydrous calcium citrate contains approximately 24.1%. Confirm the supplier's actual specification and calculate the required input on the same basis.
Common commercial specifications are around 97% to 99%, while compendial calcium citrate tetrahydrate may use a defined range such as 97.5% to 100.5%. The appropriate specification depends on the intended food, supplement, or compendial application and should be stated clearly in the purchase specification.
A COA is typically used to verify the batch against agreed specifications, while TDS and SDS provide technical and handling information. For regulated or export applications, buyers may also request applicable testing reports and certification documentation relevant to the target market.
Store calcium citrate in a cool, dry environment in tightly closed packaging and protect it from moisture, excessive heat, and direct sunlight. Because hydration state and moisture can affect the material specification, storage conditions should be maintained consistently throughout warehousing and processing.
Calcium citrate is a versatile nutritional calcium ingredient for supplement, food fortification, mineral blend, and powdered nutrition applications. When sourcing it in bulk, the key technical considerations are hydration state, elemental calcium content, assay basis, grade, particle characteristics, and documentation. Contact us today to request samples, a COA, technical documents, and a wholesale quotation for calcium citrate.
Packaging & Delivery
| Selling Units: | Kilogram |
|---|
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