L-Lactate-13C ((S)-2-Hydroxypropanoic acid-13C) sodium is the 13C-labeled L-Lactic acid sodium (HY-W040233). L-lactate Sodium is a buildiing block which can be used as a precursor for the production of the bioplastic polymer poly-lactic acid. L-Lactic acid Sodium has antiproliferative activity[1][2][3].