Dimethocaine hydrochloride is primarily used in research settings as a local anesthetic. It is often studied for its effects on the nervous system, particularly in understanding the mechanisms of local anesthesia and nerve signal blocking. Researchers utilize it to explore its potential in pain management and to compare its efficacy and safety profile with other anesthetic agents. Additionally, it is sometimes employed in biochemical studies to investigate its interactions with sodium channels in nerve cells, which are critical for the transmission of pain signals. Its application is largely confined to laboratory environments, as it is not approved or widely used in clinical practice.