Sodium Citrate - Na3C6H5O7

What is Sodium Citrate?

Na3C6H5O7 is sodium salt of citrate which has an alkalinizing activity with chemical name Sodium Citrate. It is also called Trisodium Citrate or Citrosodine or Natrocitral. It is widely used as a food preservative, for alkalization of urine to prevent kidney stones, an anticoagulant for stored blood, and buffer.

On absorption, Natrocitral dissociates into citrate anions and sodium cations. organic citrate ions are metabolized to bicarbonate ions and result in the buffering of excess hydrogen ion, potentially the reversal of acidosis, an increase in the plasma bicarbonate concentration, and the raising of blood pH. It is trisodium salt of citric acid and dissolves in water. It has a pH value between 7.5 and 9.0.

Properties of Sodium Citrate – Na3C6H5O7


Sodium Citrate

Molecular weight of Na3C6H5O7

258.068 g/mol

No. of hydrogen bond acceptor


Monoisotopic mass of Sodium Citrate

257.973 g/mol

Melting point of Sodium Citrate

>300 °C

No. of hydrogen bond donor


Sodium Citrate structure – Na3C6H5O7

Sodium Citrate structure

Na3C6H5O7 Uses (Sodium Citrate)

  • Sodium Citrate helps in enabling melting of cheeses by not becoming greasy.
  • Used in drinks and food as acidity regulator.
  • Used as an emulsifier for oils.
  • Used as a pharmaceutical aid.
  • Used as an anticoagulant for blood.
  • Used to prevent curdling of milk.
  • Used as a food additive.
  • Used to avoid clotting of fresh beef blood.
  • Used in electroplating.

Health hazards

Citrosodine has been verified to be of low concern after conducting various experiments. It is combustible. When inhaled this compound, rest and breath fresh air. When it comes in contact with skin, rinse and wash skin with soap and water. When it accidentally gets into the eyes, rinse with plenty of water. Incase you ingest this compound, rinse your mouth thoroughly.

Learn more about the Structure, physical and chemical properties of Na3C6H5O7 from the experts at BYJU’S.

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