D-(-)-3-Phosphoglyceric acid disodium (3-Phospho-D-glyceric acid disodium) is an intermediate in several biological pathways, most notably glycolysis/gluconeogenesis and the biosynthesis of serine, glycine, and threonine, which competitively inhibits yeast enolase. It also has numerous roles as an intermediate in biosynthetic pathways in plants, eukaryotes, and prokaryotes.

3-Phosphoglyceric acid is a metabolic intermediate in both glycolysis and the Calvin cycle. It is involved in alveolar macrophage epigenetic regulation.