Used in histology and cell biology to detect the presence of iron in cell samples. The stain specifically binds to ferric iron deposits, producing a bright blue color that highlights iron-rich areas under microscopic examination. Commonly applied in diagnosing conditions involving abnormal iron accumulation, such as hemochromatosis or hemosiderosis, at the cellular level. Also used in research settings to study iron metabolism, storage, and transport in cultured cells or tissue samples. The kit provides reagents for a reliable and sensitive detection method, suitable for both frozen and paraffin-embedded cell preparations. Results are typically permanent and can be combined with counterstains for better morphological context.