Calcium carbonate is the calcium salt of carbonic acid (CaCO3, CAS 471-34-1), and the most elementally concentrated of the common calcium sources at roughly 40% calcium by weight. We source USP/FCC grades that are mined and refined from limestone or marble deposits. As an inorganic carbonate salt it is essentially water-insoluble, which sets it apart from the organic-acid salts such as citrate, gluconate and lactate in this family, and it carries a far higher elemental load per gram than the chelated or mixed-salt forms. It is supplied as a white crystalline to fine powder. We manufacture it in tablets, capsules, powders and gummies.
- Tablets
- Capsules
- Powders
- Gummies
Applications
Single-mineral calcium supplements, multivitamins, chewable tablets and gummies.
Documentation & quality
Every order is backed by the documents your quality team files, and the controls behind them.
Certificate of Analysis
every batchSpecification sheet
on requestAllergen statement
on requestGMO statement
on requestTraceability
on requestSafety Data Sheet
where applicableHow it’s controlled
- Identity verified on every incoming raw material
- Screened for heavy metals and microbial contaminants
- Full batch and lot traceability
- Produced under our certified NSF GMP system
Other forms of Calcium
Calcium Citrate
Tricalcium dicitrate
- CAS
- 813-94-5
- Formula
- C12H10Ca3O14
- Elemental
- ~24% Ca (anhydrous; ~21% as tetrahydrate)
- Vegan
- Gluten-free
- Non-GMO
Calcium Citrate Malate
Calcium citrate malate (CCM)
- CAS
- 142606-53-9
- Elemental
- ~24% Ca (variable ratio)
- Vegan
- Gluten-free
- Non-GMO
Calcium Gluconate
Calcium D-gluconate
- CAS
- 299-28-5
- Formula
- C12H22CaO14
- Elemental
- ~9% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Lactate
Calcium 2-hydroxypropanoate
- CAS
- 814-80-2
- Formula
- C6H10CaO6
- Elemental
- ~18% Ca (anhydrous; ~13% as pentahydrate)
- Vegan
- Gluten-free
- Non-GMO
Calcium Ascorbate
Calcium L-ascorbate
- CAS
- 5743-27-1
- Formula
- C12H14CaO12
- Elemental
- ~10% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Bisglycinate
Calcium bis(glycinate)
- CAS
- 35947-07-0
- Formula
- C4H8CaN2O4
- Elemental
- ~21% Ca
- Vegan
- Gluten-free
- Non-GMO
Tricalcium Phosphate
Tricalcium bis(phosphate)
- CAS
- 7758-87-4
- Formula
- Ca3(PO4)2
- Elemental
- ~39% Ca
- Vegan
- Gluten-free
- Non-GMO
Microcrystalline Hydroxyapatite (MCHC)
Hydroxyapatite (pentacalcium hydroxide tris(phosphate))
- CAS
- 1306-06-5
- Formula
- Ca5(PO4)3(OH)
- Elemental
- ~40% Ca (mineral phase; lower in whole-bone ingredient)
- Gluten-free
- Non-GMO
Marine Algae Calcium (Aquamin)
Calcium carbonate (calcified red algae, Lithothamnion)
- CAS
- 471-34-1
- Formula
- CaCO3
- Elemental
- ~32% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Lactate Gluconate
Calcium lactate gluconate
- CAS
- 11116-97-5
- Formula
- C42H78Ca5O48
- Elemental
- ~13% Ca
- Vegan
- Gluten-free
- Non-GMO
Dicalcium Phosphate
Calcium hydrogen phosphate (dibasic)
- CAS
- 7757-93-9
- Formula
- CaHPO4
- Elemental
- ~29.5% Ca (anhydrous; ~23% as dihydrate)
- Vegan
- Gluten-free
- Non-GMO
Calcium Malate
Dicalcium malate dihydroxide
- CAS
- 671197-49-2
- Formula
- C4H6Ca2O7
- Elemental
- ~29% Ca (dicalcium malate dihydroxide)
- Vegan
- Gluten-free
- Non-GMO
Monocalcium Phosphate
Calcium dihydrogen phosphate (monobasic)
- CAS
- 7758-23-8
- Formula
- Ca(H2PO4)2
- Elemental
- ~17% Ca (anhydrous)
- Vegan
- Gluten-free
- Non-GMO
Calcium Glycerophosphate
Calcium glycerophosphate
- CAS
- 27214-00-2
- Formula
- C3H7CaO6P
- Elemental
- ~19% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Orotate
Calcium orotate
- CAS
- 22454-86-0
- Formula
- C10H6CaN4O8
- Elemental
- ~11.4% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Aspartate
Calcium bis(L-aspartate)
- CAS
- 39162-75-9
- Formula
- C8H12CaN2O8
- Elemental
- ~13.2% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Pyruvate
Calcium dipyruvate
- CAS
- 52009-14-0
- Formula
- C6H6CaO6
- Elemental
- ~18.7% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Acetate
Calcium acetate
- CAS
- 62-54-4
- Formula
- C4H6CaO4
- Elemental
- ~25.3% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Sulfate
Calcium sulfate
- CAS
- 7778-18-9
- Formula
- CaSO4
- Elemental
- ~29.4% Ca (anhydrous; ~23% as dihydrate)
- Vegan
- Gluten-free
- Non-GMO
Calcium Chloride
Calcium chloride
- CAS
- 10043-52-4
- Formula
- CaCl2
- Elemental
- ~36.1% Ca (anhydrous)
- Vegan
- Gluten-free
- Non-GMO
Calcium Hydroxide
Calcium hydroxide
- CAS
- 1305-62-0
- Formula
- Ca(OH)2
- Elemental
- ~54.1% Ca
- Vegan
- Gluten-free
- Non-GMO
Calcium Pidolate
Calcium bis(5-oxo-L-prolinate)
- CAS
- 31377-05-6
- Formula
- C10H12CaN2O6
- Elemental
- ~13.5% Ca
- Vegan
- Gluten-free
- Non-GMO
Oyster Shell Calcium
Calcium carbonate (oyster shell)
- CAS
- 471-34-1
- Formula
- CaCO3
- Elemental
- ~38-40% Ca
- Gluten-free
- Non-GMO
Coral Calcium
Calcium carbonate (marine coral)
- CAS
- 471-34-1
- Formula
- CaCO3
- Elemental
- ~24-38% Ca (with trace magnesium and minerals)
- Gluten-free
- Non-GMO
Eggshell Calcium
Calcium carbonate (eggshell)
- CAS
- 471-34-1
- Formula
- CaCO3
- Elemental
- ~38-39% Ca
- Gluten-free
- Non-GMO