Used as a chromogenic glycosidase substrate in biochemical assays, particularly for detecting enzyme activity in cell biology and diagnostic applications. Its structure allows it to act as a probe for α-mannosidase enzymes, releasing 6-bromo-2-naphthol, a detectable chromogenic product, upon enzymatic cleavage. Commonly applied in histochemistry and flow cytometry to visualize enzyme distribution in cells and tissues. Also utilized in high-throughput screening for enzyme inhibitors and in studying lysosomal storage disorders.