FC9402（Cat No.:I045262）is a synthetic sodium channel blocker that inhibits voltage-gated sodium currents, thereby suppressing neuronal excitability and action potential propagation. By targeting sodium channels, FC9402 reduces abnormal electrical signaling, making it a valuable research tool for studying ion channel physiology, neuronal communication, and excitotoxicity. It has been explored in preclinical models of epilepsy, neuropathic pain, and other hyperexcitability disorders. With high potency and selectivity, FC9402 enables precise modulation of sodium channel activity in both biochemical assays and electrophysiological studies, supporting the development of novel therapeutics for channelopathies and neurodegenerative diseases.