Calcium citrate

Calcium citrate (CAS 813-94-5), also marketed as E333iii, is the calcium salt of citric acid used in food, pharmaceutical, and personal care manufacturing.

Where is Calcium citrate used?

• Food and beverage: pH stabiliser in processed products and sequestrant preventing metal-catalysed oxidation in canned goods and beverages
• Pharmaceuticals: bioavailable calcium source in dietary supplement tablets and capsules
• Personal care: pH buffer in topical formulations and chelator of trace metals that degrade active ingredients
• Fruit and vegetable processing: firming agent maintaining texture in canned and frozen products
• It also functions as a buffering agent, chelating agent, and mineral supplement source.

Good to know: Its absorption profile suits formulations targeting populations with low gastric acid levels. Recognised grades include FCC, USP, and Ph. Eur.

Commercial specifications

• Anhydrous grade is standard for dry supplement and food applications requiring high purity and stability
• Bulk quantities in fiber drums or multi-wall bags