Monosodium citrate, more correctly, sodium dihydrogen citrate (Latin: ), is an acid salt of citric acid. Disodium citrate and trisodium citrate are also known. It can be prepared by partial neutralisation of citric acid with an aqueous solution of sodium bicarbonate or carbonate. It has a slightly acidic taste.
NaHCO3 + C6H8O7 → NaC6H7O7 + CO2 + H2O
Na2CO3 + 2C6H8O7 → 2NaC6H7O7 + CO2 + H2O
It is highly soluble in water and practically insoluble in ethanol. Monosodium citrate is used as an anticoagulant in blood samples.Clinical Hematology: Theory and Procedures, Mary Louise Turgeon It is used as an alkalinizing agent to prevent kidney stone disease. The crystals form as nearly perfect cubes.
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