Used as an intermediate in organic synthesis, particularly in the development of pharmaceuticals and bioactive compounds. It serves as a building block for constructing heterocyclic molecules due to the reactivity of the glyoxal functional group. Its morpholine ring enhances solubility and stability, making it suitable for use in medicinal chemistry research. Commonly employed in the preparation of kinase inhibitors and other enzyme modulators. Also utilized in the synthesis of fluorescent probes and dyes, where the phenylglyoxal moiety acts as a key functional group for conjugation or labeling.