Used extensively in the synthesis of fluorescently labeled oligonucleotides for molecular biology and genetic research. It enables the incorporation of fluorescein dye into DNA or RNA sequences, allowing for detection and visualization in various applications such as fluorescence in situ hybridization (FISH), PCR, and gel electrophoresis. The labeled oligonucleotides are valuable tools in studying gene expression, genetic mutations, and nucleic acid interactions. Additionally, it is employed in diagnostic assays and high-throughput screening technologies to track and analyze nucleic acid sequences with high sensitivity and specificity.