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Calcium Citrate (Tricalcium Citrate)

CAS 813-94-5 · Formula C12H10Ca3O14 · MW 498.4 g/mol

A free-flowing calcium salt of citric acid valued where soluble calcium and citrate buffering are needed in food and beverage systems. It is used as a food additive functioning as an acidity regulator, sequestrant, buffer, and firming agent, and to improve the baking properties of flour.

Part of Acids & Salts
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HS Code
2918.15
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
pH Adjustment
Solubility
White powder, odorless. Insol in alcohol. Loses most of its water @ 100 °C and all @ 120 °C /Tetrahydrate/
Functional Roles
pH Adjustment
INCI Name
CALCIUM CITRATE
CosIng Functions
BUFFERING
Industries Served
Beauty & Personal Care Food & Beverage HI&I Cleaning Industrial Manufacturing Textiles Water Treatment
Applications & Use Cases
  • ▸ Acidity regulator: Buffers and controls pH in jams, soft drinks, and confectionery.
  • ▸ Sequestrant: Binds metal ions in food systems.
  • ▸ Firming agent: Firming and buffering additive in foods.
  • ▸ Flour treatment: Improves the baking properties of flour.
  • ▸ Citrate intermediate: Captive feedstock for citric acid and other citrates.
Physical Properties
Physical Description
Fine white powder
Solubility
White powder, odorless. Insol in alcohol. Loses most of its water @ 100 °C and all @ 120 °C /Tetrahydrate/
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2918 . 15
Chapter 29
Organic chemicals
Heading 29.18
Internationally harmonized (WCO HS)
Subheading 2918.15
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
813-94-5
Molecular Formula
C12H10Ca3O14
Molecular Weight
498.4 g/mol
IUPAC Name
tricalcium bis(2-hydroxypropane-1,2,3-tricarboxylate)
INCI Name
CALCIUM CITRATE
PubChem CID
13136
InChI Key
FNAQSUUGMSOBHW-UHFFFAOYSA-H
Synonyms & Trade Names
Calcium citrate Tricalcium dicitrate Acicontral TRICALCIUM CITRATE Calcitrate Citrical Calcium citrate, tribasic Citracal Tribasic calcium citrate Calcimax Citric acid, calcium salt (2:3) INS NO.333(III) tricalcium citrate tetrahydrate INS-333(III) Calcium (as citrate) 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, calcium salt (2:3) Calcium 2-hydroxy-1,2,3-propanetricarboxylate (3:2) E-333(III)
Full Description

Calcium Citrate (CAS 813-94-5) is the calcium salt of citric acid. It is used as a food additive functioning as an acidity regulator, sequestrant, buffer, and firming agent, and to improve the baking properties of flour. It also serves as a captive intermediate in the production of citric acid and other citrates.

Frequently Asked Questions

What is calcium citrate used for?

Calcium citrate (CAS 813-94-5) is the calcium salt of citric acid, used as a food additive functioning as an acidity regulator, sequestrant, buffer, and firming agent, and to improve the baking properties of flour. It also serves as a captive intermediate in the production of citric acid and other citrates.

What is calcium citrate made of?

It is the calcium salt of citric acid (formula C12H10Ca3O14), produced by reacting citric acid with a calcium source. This grade is supplied as a food-grade powder.

What is the difference between calcium citrate and calcium carbonate?

Calcium citrate is the citrate salt of calcium; calcium carbonate is CaCO3, the carbonate salt. They differ in solubility, acid behavior, and functional role — citrate also acts as a sequestrant and buffer in food systems, while carbonate is commonly used as a filler and acid-neutralizer.

Does RawSource supply food-grade calcium citrate in bulk?

Yes. RawSource distributes food-grade calcium citrate powder in bulk bags and supersacks to manufacturers. Send your target volume for a quote on pack sizes and lead time.

Can RawSource provide a CoA and SDS for calcium citrate?

Yes. A Certificate of Analysis and Safety Data Sheet are provided with shipments. Request current food-grade documentation against CAS 813-94-5 when you submit an RFQ.

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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