HKOCl-4 (BXY2142) is a rhodol-based yellow fluorescent probe that demonstrates exceptional sensitivity and selectivity in detecting hypochlorous acid. Its absorption wavelength is significantly longer than that of fluorescein-based probes, and it exhibits better pH stability. Notably, HKOCl-4 exhibits excitation at 530 nm and emission at 557 nm.
HKOCl-4m is a rhodol-based fluorescent probe designed for the specific and deliberate targeting of mitochondria, enabling the monitoring of mitochondrial hypochlorous acid (HOCl).