DL-Tartaric Acid (CAS 133-37-9) Product Introduction DL-Tartaric Acid (CAS 133-37-9) is a racemic mixture of D- and L-tartaric acid isomers, widely used as a natural acidulant, chelating agent, and antioxidant in various industries. This versatile organic acid occurs naturally in many plants, particularly grapes, and is valued for its stability, solubility, and multifunctional properties in industrial applications. Physical and Chemical Specifications Property Specification