Zinc Citrate | CAS 546-46-3 | Bioavailable Zinc

Product Name: Zinc Citrate
CAS No.: 546-46-3
Molecular Formula (anhydrous): C₆H₆O₇Zn
Appearance: White crystalline powder or granules
Solubility: Approximately 14 g/L in water at 20 °C
pH of 1% solution: 5.5–6.5
Stability: Non-hygroscopic; remains stable when stored dry

1. Introduction

Zinc citrate is a salt of citric acid and zinc with high oral bioavailability and low GI irritation. It supports immunity, participates in carbohydrate and lipid metabolism, and promotes skin healing and mucosal integrity.

Zinc is a cofactor for over 300 enzymes and an essential trace element for normal body function. In citrate form, it is more easily absorbed in the intestine due to complexation with citric acid, making this preparation preferable for the prevention and correction of zinc deficiency.

2. Synthesis

Produced by precipitation of zinc oxide or hydroxide with trisodium citrate solution, followed by heating, washing, and crystallization.

3. Properties

• Appearance: White crystalline powder or granules

• Solubility: Approximately 14 g/L in water at 20 °C

• pH of 1% solution: 5.5–6.5

• Stability: Non-hygroscopic; remains stable when stored dry

4. Applications

• Nutraceuticals and pharmaceuticals: Prevention and treatment of zinc deficiency

• Dietetics: Component of vitamin-mineral complexes

• Cosmetics: Additive in creams and serums to improve skin regeneration

5. Conclusion

Zinc citrate is an effective and safe form of zinc with high bioavailability. It is often combined with vitamins A, D, and B vitamins for synergistic metabolic effects.