Types of FdUrd are categorized by chemical variants, with BrdU (Bromodeoxyuridine) and FdU (Fluorodeoxyuridine) as primary subtypes. BrdU, a bromine-substituted analog, is widely utilized in cell proliferation studies and immunohistochemistry, contributing 40% to the market. Its adoption is fueled by its role as a DNA labeling agent in research and diagnostic applications. FdU, the fluorine-substituted form, dominates the remaining 60% of the market, driven by its therapeutic use in cancer treatment and antiviral drug development. The BrdU segment is heavily influenced by academic and biotech research demand, while FdU’s growth is tied to clinical advancements in oncology. These subtypes illustrate how 5-Fluoro-2′-deoxyuridine segmentation is shaped by both research and therapeutic applications, with distinct market drivers for each chemical variant.