Monosodium citrate
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| Molar mass | Template:Chem molar mass |
| Appearance | white powder hygroscopic |
| Odor | odorless |
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| Solubility | negligible in ethanol |
| Acidity (pKa) | 3.50–3.80 |
| Template:Longitem | Monoclinic |
| Template:Longitem | P21/a (No. 4) |
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Monosodium citrate, more correctly, sodium dihydrogen citrate (Latin: Script error: No such module "Lang".), 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[2] with an aqueous solution of sodium bicarbonate or carbonate. It has a slightly acidic taste.[2]
- NaHCO3 + C6H8O7 → NaC6H7O7 + CO2 + H2O
- Na2CO3 + 2C6H8O7 → 2NaC6H7O7 + CO2 + H2O
It is highly soluble in water and practically insoluble in ethanol.[2] Monosodium citrate is used as an anticoagulant in donated blood.[3] It is used as an alkalinizing agent to prevent kidney stone disease.[4] The crystals form as nearly perfect cubes.[5]
References
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