1-(Dihydrogen phosphate)-α-D-glucopyranuronic Acid Trisodium Salt is an intermediate in the synthesis of Trilithium UDP-glucuronic Acid-13C1, 15N2 (T886287), which is an isotope labelled analog of Trisodium UDP-glucuronic Acid (T886285). Trisodium UDP-glucuronic Acid is a reactant used in the enzymatic preparation of β-glucuronides.