L(+)-Tartaric acid is the natural levorotatory enantiomer of tartaric acid, predominantly sourced from potassium bitartrate (cream of tartar) recovered as a byproduct of winemaking. It can also be produced by chemical resolution of racemic tartaric acid or by enzymatic methods. L-Tartaric acid has a sharp, slightly astringent sour taste and is highly soluble in water.
This makes it suitable for both liquid and dry food applications. It is the only form of tartaric acid approved for use in wine production in most regions and is the preferred form for food applications requiring natural-origin ingredients. The ingredient exhibits strong chelating properties and contributes to antioxidant protection in food systems containing metal-catalyzed oxidation reactions.
