Used in analytical chemistry as a reagent for the determination of iron content in various samples. It serves as a standard in titrimetric analysis due to its well-defined composition and stability. In photography, it is employed in certain photographic processes, such as actinometry and blueprinting, to enhance image quality, control development, and measure light intensity owing to its photosensitivity. Additionally, it finds application in educational laboratories for demonstrating coordination chemistry, redox reactions, and photosensitive properties, helping students understand complex ion behavior, electron transfer processes, and light-induced reactions.