Zinc Citrate

CAS Registry Number:


Chemical Formula:

(C6H5O7)2Zn3 · 3H2O & (C6H5O7)2Zn3 · 2H2O



General Information

Zinc citrate is available as dihydrate and trihydrate and is produced by complete neutralisation of citric acid with a high purity zinc source, subsequent precipitation and dehydration.

Zinc citrate is mainly used in dental care products such as toothpastes, mouthwashes and chewing gums due to its antimicrobial and anti-inflammatory effects and its ability to reduce or inhibit the formation of dental plaque and tartar. In pharmaceuticals, zinc citrate fights common colds. Zinc is increasingly used in food supplements, functional foods and beverages.

As an organic mineral source it is preferred in many applications over inorganic sources because of its superior bioavailability, physiological compatibility and nearly neutral taste compared to other zinc salts.

Among the organic zinc salts zinc citrate has one of the highest zinc content (31%).

Zinc citrate is supplied as a white to almost white powder. It is practically odourless, slightly soluble in water, soluble in diluted acid and practically insoluble in ethanol (96%). Zinc citrate has an inverse solubility.


Slightly soluble in water high mineral content (31%) zinc citrate trihydrate is specified according to food, pharma and oral care grade.

Zinc citrate dihydrate is specified according to the latest edition of the USP.

The following granulation types are available:

Zinc citrate trihydrate:

  • Powder

Zinc citrate dihydrate:

  • Powder

Zinc citrate is supplied in polyethylene lined paper bags with 25 kg net weight.

  • Available as dihydrate or trihydrate
  • White crystalline powder
  • Odourless
  • Neutral taste
  • High mineral content (31%)
  • Slightly soluble in water
  • Highly bioavailable
  • Antibacterial
  • Antiinflammatory
  • Allergen and GMO free

Main functions

  • Highly bioavailable zinc source
  • Antibacterial agent
  • Anti-plaque in oral care products

Industrial Applications


  • Baby Food, Infant Formula
  • Cereals, Snacks
  • Confectionery
  • Dairy
  • Dairy Alternatives
  • Desserts, Ice Cream
  • Fruit Preparations, Sweet Spreads
  • Meat Alternatives
  • Plant-based Products
  • Fire protection


  • Carbonated Soft Drinks
  • Instant Drinks, Syrups
  • Juice Drinks
  • Plant-based
  • RTD Tea and Coffee
  • Sports and Energy Drinks
  • Waters
  • Fire protection


Personal Care


Legal aspects