Food & beverage
Acidity regulator; calcium source in fortified foods and beverages.
Ingredients / Acidulants & pH control / Calcium Citrate
Acidulants & pH control
Calcium Citrate (E 333(iii))
Calcium citrate for U.S. manufacturers, from vetted producers. FCC / USP grade on request. Download the sample spec sheet, then send us your grade and quantity.
TRACED · CERTIFIED · RELIABLE · TRANSPARENT · TESTED
Key facts
| E-number (EU) | E 333(iii) |
|---|---|
| Synonyms | Tribasic calcium citrate |
| Chemical formula | (C6H6O7)2Ca3·4H2O |
| Molecular weight | 570,51 |
| Description | Fine white powder |
| Grades | EU Reg. 231/2012 (E 333(iii)) sample spec · FCC / USP available on request for U.S. food/pharma use |
| Origin | Confirmed in every offer; stated per lot on the COA |
| Storage, shelf life, packaging | Per the producer's specification, on request |
What calcium citrate is
Formula (C6H6O7)2Ca3·4H2O, molecular weight 570,51. Fine white powder. (Source: EU Regulation 231/2012, E 333(iii).)
Applications by industry
Pharma & nutraceuticals
Mineral salt for supplements.
Sample specification
Values from EU Regulation 231/2012 (E 333(iii)), consolidated text of 18.08.2026. Actual values depend on the producer; the producer's specification and the COA for your lot are available on request.
| Assay | Not less than 97,5 % on the anhydrous basis |
|---|---|
| Loss on drying | Not more than 14,0 % (180 °C, 4 hours) |
| Oxalates | Not more than 100 mg/kg (expressed as oxalic acid, after drying) |
| Fluoride | Not more than 30 mg/kg (expressed as fluorine) |
| Arsenic | Not more than 1 mg/kg |
| Lead | Not more than 1 mg/kg |
| Mercury | Not more than 1 mg/kg |
| Aluminium | Not more than 30 mg/kg (only if added to food for infants and young children) Not more than 200 mg/kg (for all uses except food for infants and young children) |
| Carbonates | Dissolving 1 g of calcium citrate in 10 ml 2 N hydrochloric acid must not liberate more than a few isolated bubbles |
Download the full spec sheet (PDF)
Documents and sourcing
Droplet promise. Origin confirmed in every offer. Sample lot record on request, from the producer. SDS, allergen and other statements on request. We work with vetted producers and give you access to U.S.- and EU-stocked material through our partner network.
Data sheet, SDS and COA on request. Every delivery ships with a COA linked to the delivered lot.
Questions buyers ask
What is calcium citrate used for?
Typical uses by industry. Food & beverage: Acidity regulator; calcium source in fortified foods and beverages. Pharma & nutraceuticals: Mineral salt for supplements. Suitability for your product and market is confirmed with the producer's specification.
Which grades can McBoeck supply?
Food grade to EU Regulation 231/2012 (E 333(iii)). FCC / USP grade is available on request for U.S. food and pharma use. Particle size and other grade details follow the producer's specification, on request.
Which documents come with calcium citrate?
Every delivery ships with a COA linked to the delivered lot. Origin confirmed in every offer. Sample lot record on request, from the producer. SDS, allergen and other statements on request.
What does the sample spec sheet show?
Limits for assay, loss on drying, oxalates, fluoride, arsenic, lead, mercury, aluminium and carbonates, taken from EU Regulation 231/2012. Actual values depend on the producer; the producer's specification and the lot COA are available on request.
How do I get a quote?
Send us the grade, quantity and delivery location through the quote form or at [email protected]. We work with vetted producers and give you access to U.S.- and EU-stocked material through our partner network.
Related acidulants & pH control
Acetic AcidCalcium GluconateCitric Acid, AnhydrousFumaric AcidAll acidulants & pH control
Need calcium citrate?
Send us the grade, quantity and delivery location. Email [email protected] or call +1 (713) 766-6811.