Used in electrochemiluminescence (ECL) assays for clinical diagnostics and bioanalysis. It emits light when electrochemically stimulated in the presence of a coreactant like tripropylamine, enabling highly sensitive detection of biomolecules such as DNA, proteins, and pathogens. Commonly employed in automated immunoassay systems for disease markers, including hormones, viruses, and cancer antigens. Also used in research for developing biosensors and studying electron transfer processes. Its stability and strong luminescent signal make it ideal for high-throughput, low-detection-limit analytical methods.