What Calcium Citrate is — and why it stays in demand
Calcium Citrate (CAS 813-94-5) is a widely used citrate-based calcium source for food fortification and dietary supplement formulations. For importers and manufacturers, the “best” calcium ingredient is often the one that remains predictable in production: steady specs, stable performance, and no surprises from one lot to the next.
Chemical identity buyers should confirm before ordering
Chemically, Calcium Citrate is the calcium salt of citric acid. The commonly referenced form (tricalcium citrate) is listed as Ca₃(C₆H₅O₇)₂ with a molecular weight of about 498.4 g/mol (anhydrous). In trade, hydrate forms also exist and can be referenced separately, so it’s smart to confirm the exact form on the specification/COA to match your labeling and formulation needs.
Key physical properties that affect real production
Appearance & odor
Calcium Citrate is typically supplied as a white, odorless powder, which helps keep finished products clean in sensory profile (especially in nutrition blends and premixes).
Density & thermal behavior
Reported density for the anhydrous form is around 1.63g/cm³, useful when planning packaging volume and dosing consistency. It is also commonly described as decomposing on heating rather than having a sharp melting point—an important detail for storage and process temperature control.
Solubility
Calcium Citrate is sparingly soluble in water (commonly reported around 0.95 g/L at 25°C) and insoluble in alcohol. In practice, this means many manufacturers treat it as a stable mineral source and design the process around dispersion, particle handling, and mixing strategy rather than expecting instant dissolution.
Quick comparison: Magnesium Citrate & Sodium Citrate
Citrate salts often get compared during sourcing. Magnesium Citrate (CAS 7779-25-1) is more often positioned for magnesium supplementation and functional blends, while Sodium Citrate (CAS 68-04-2) is widely used for buffering and processing roles in food and industry. Calcium Citrate is typically chosen when the primary goal is calcium fortification with a citrate-based profile.
SNOWHITE CHEMICAL CO., LTD — export supply that stays consistent
At SNOWHITE CHEMICAL CO., LTD, we support global buyers who value consistency over marketing buzzwords. For repeat закуп (repeat procurement), what matters is aligning the product form and key parameters early, then keeping packaging, documentation, and shipment coordination stable across orders—so your production plan stays predictable.
FAQ
Q1: What is Calcium Citrate (CAS 813-94-5) used for?
A: It’s widely used as a citrate-based calcium source in food fortification and dietary supplements, especially where consistent performance and stable specs matter.
Q2: What are the key physical properties of Calcium Citrate?
A: It is typically a white, odorless powder; the anhydrous form has a reported density around 1.63 g/cm³, decomposes on heating, and is sparingly soluble in water.
Q3: Calcium Citrate vs Sodium Citrate vs Magnesium Citrate — what’s the difference?
A: Calcium Citrate is mainly selected for calcium fortification; Sodium Citrate is commonly used for buffering/processing; Magnesium Citrate is used more for magnesium supplementation and functional blends.
