(R)-Dimethyl 2-hydroxysuccinate, also known as (R)-Dimethyl malate, is a chiral diester derivative of D-malic acid. It is a colorless to pale yellow liquid with the molecular formula C6H10O5 and a molecular weight of 162.14 g/mol. This compound is characterized by its two ester groups and a hydroxyl group on a succinate backbone, with the (R)-configuration at the chiral center. Its primary and most significant application is as a versatile chiral building block and intermediate in pharmaceutical synthesis. The presence of both ester and hydroxyl functionalities makes it a valuable precursor for the synthesis of various bioactive molecules, including chiral drugs and natural products. It is particularly useful in asymmetric synthesis and for introducing the D-malic acid moiety into more complex structures. While its core use is in fine chemical and pharmaceutical research as a chiral synthon, it also serves as a starting material or reagent in organic synthesis for constructing functionalized succinate derivatives. It should be handled with standard laboratory precautions, avoiding contact with skin and eyes, and used in a well-ventilated area.