Maltol is a naturally occurring organic compound that is used primarily as a flavor enhancer. It is found in the bark of larch tree, in pine needles, and in roasted malt (from which it gets its name). It is a white crystalline powder that is soluble in hot water, chloroform, and other polar solvents. Because it has the odor of caramel, maltol is used to impart a sweet aroma to fragrances. Maltol has a taste and odor reminiscent of freshly baked bread, and is used as a flavor enhancer (E number E636) in breads and cakes.
Maltol, like related 3-hydroxy-4-pyrones such as kojic acid, binds to hard metal centers such as Fe3+, Ga3+, Al3+, and VO3+.[1] Related to this property, maltol has been reported to greatly increase aluminum uptake in the body and to increase the oral bioavailability of gallium and iron.
| Product name | Maltol |
| Molar mass | 126.11 g/mol |
| Density | 1.348 g/cm3 |
| Melting point | 161-162 °C |
| Boiling point | 170 ºC (10 mmHg) |
| Water solubility | 1.2 g/100 mL (25 ºC) |