Calcium citrate

Calcium citrate (CAS 813-94-5), also marketed as E333iii, is the calcium salt of citric acid used across food, pharmaceutical, and personal care manufacturing. It functions as a buffering agent, chelating agent, and mineral supplement source.

In food and beverage production, it stabilizes pH in processed products and acts as a sequestrant to prevent metal-catalyzed oxidation in canned goods and beverages. This ensures product stability and shelf life.

Pharmaceutical manufacturers use it as a bioavailable calcium source in dietary supplement tablets and capsules. Its absorption profile suits formulations targeting populations with low gastric acid levels effectively.

In personal care, it buffers pH in topical formulations and chelates trace metals that would otherwise degrade active ingredients. This helps maintain the overall efficacy of preservatives within the final product.

It also functions as a firming agent in fruit and vegetable processing, maintaining texture in canned and frozen products. This application is vital for preserving the structural integrity of processed produce.

Calcium citrate is supplied as a white powder in both anhydrous and tetrahydrate forms. The anhydrous grade is the standard for most dry supplement and food applications requiring high purity and stability.

Recognized grades include FCC, USP, and Ph. Eur., supporting use across food, nutraceutical, and pharmaceutical supply chains. These standards ensure the material meets rigorous global safety requirements.

Bulk quantities are available in fiber drums or multi-wall bags for large-scale manufacturing. Technical-grade material is also available for specific industrial applications outside of the food and drug sectors.