Fluorescein dioctanoate

Fluorescein dioctanoate is a non-fluorescent lipophilic precursor dye that penetrates cell membranes and becomes fluorescent upon enzymatic hydrolysis by intracellular esterases. It is widely used for live cell viability assays, apoptosis studies, esterase activity measurement, and high-throughput drug screening. Its ability to selectively label living cells makes it a valuable tool in cell biology, toxicology, and biomedical imaging.