Trisodium citrate dihydrate, a white crystalline or powdery substance

Trisodium citrate dihydrate, a white crystalline or powdery substance, is widely recognized for its buffering and chelating properties. It is used across various industries, including food, pharmaceuticals, and cosmetics, for its ability to stabilize pH levels and inhibit microbial growth.

Chemical Properties

Chemical Formula: C6H5Na3O7·2H2O

CAS Number: 6132-04-3

Molecular Weight: 294.1 g/mol

Appearance: White crystalline or powdery substance

Solubility: Highly soluble in water (720 g/L at 25°C), slightly soluble in boiling water, and insoluble in ethanol

pH Range: 7.0-9.0 (25°C, 50 mg/mL in water)

Stability: Stable under normal conditions but decomposes when heated above 150°C

Applications

Food Industry: Used as a preservative, flavoring agent, and pH buffer in beverages, jams, and dairy products.

Pharmaceuticals: Functions as an anticoagulant, buffering agent, and flavoring component in medications.

Laboratory and Research: Essential for preparing buffers and solutions, particularly in biochemical and molecular biology research.

Household Products: Added to cleaning agents and personal care products for its chelating properties.

Safety and Handling

Toxicity: Considered safe for consumption and topical application.

Handling: While generally safe, avoid inhalation of dust and contact with eyes. Use appropriate protective equipment when handling.

Conclusion

Trisodium citrate dihydrate is a multifunctional compound valued for its buffering and chelating properties. Its applications span the food, pharmaceutical, and cosmetic industries, making it a crucial component in numerous products and research applications.