Potassium asparaginate
From Wikipedia, the free encyclopedia
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| Names | |
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| IUPAC name
L-Asparagine potassium salt | |
| Other names
L-Asparagine, potassium salt (1:1); L-Asparagine, monopotassium salt; Asparagine potassium | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C4H7KN2O3 | |
| Molar mass | 170.209 g·mol−1 |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium asparaginate is a potassium salt of L-asparagine amino acid.[2][3][4][5]
Potassium asparaginate can be considered both a salt and a coordination complex.[6][3] As a salt, potassium asparaginate is formed when the potassium ion (K+) replaces the hydrogen ion (H+) in the carboxyl group (–COOH) of L-asparagine, an amino acid.[3] As a coordination complex, in the context of coordination chemistry, the potassium ion coordinates with the L-asparagine, forming a stable structure where the central (metal) ion is surrounded by and associated with the L-asparagine, a ligand (complexing molecule), through coordinate covalent bonds.[3][6][7]
The composition by mass of elemental metal—potassium (K)—in potassium asparaginate (C4H7KN2O3) is approximately 23%, given that the molar mass of a potassium atom (K) is 39.1 grams per mole (g/mol), and the molar mass of a potassium asparaginate is 170.21 g/mol (39.1/170.21≈23%).[2]
The solubility of potassium asparaginate, in g/100ml of various solvents (water, ethanol, methanol), at temperatures of 30, 35 and 40 degree Celsius, is the following:[1]
| Liquid | 30°C | 35°C | 40°C |
|---|---|---|---|
| Water | 16 | 22 | 28 |
| Ethanol | 12 | 16 | 20 |
| Methanol | 11 | 15 | 19 |
Synthesis
Potassium asparaginate can be obtained from L-asparagine and potassium fluoride (KF) in a chemical reaction which yields potassium asparaginate and hydrofluoric acid (HF).[1]