- L(+)-Tartaric acid is widely used ther foods, such as soft drinks, wine ... acidColorless translucent crystals or white crystal powder with acid taste- L(+)-Tartaric acid is widely used ther foods, such as soft ... drinks, wine, candy, bread and some co oidal sweetmeats. Assay(as C4H6O6)99.7 ... a light-proof, dry and cool place. L(+)-Tartaric acid (FCCIV)