Monosodium citrate, more correctly, sodium dihydrogen citrate (Latin: natrium citricum acidulatum), 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 + H2ONa2CO3 + 2C6H8O7 → 2NaC6H7O7 + CO2 + H2O