D-myo-Inositol-4-phosphate (ammonium salt) is widely used in biochemical research, particularly in the study of cellular signaling pathways. It serves as a crucial intermediate in the inositol phosphate metabolism, which plays a significant role in processes like cell growth, differentiation, and communication. This compound is often utilized in experiments to understand the function of inositol phosphates in regulating enzymes such as kinases and phosphatases. Additionally, it is employed in the development of assays to investigate phosphoinositide signaling networks, which are essential for understanding various physiological and pathological conditions, including cancer and metabolic disorders. Its application extends to the synthesis of more complex inositol phosphate derivatives, aiding in the exploration of their biological activities and potential therapeutic uses.