Eosin Y sodium salt (CAS 17372-87-1)

Eosin Y sodium salt, with the CAS number 17372-87-1, is a water-soluble derivative of Eosin Y, which is a xanthene dye known for its vivid pinkish-red color. This compound is primarily utilized in various research fields for its fluorescent properties and its ability to bind to proteins, making it an excellent stain in histology and cytology. It is often used in combination with other dyes like Hematoxylin in techniques such as Hematoxylin and Eosin (H&E) staining, where it specifically stains the cytoplasmic components of cells. In research, Eosin Y sodium salt serves a critical function in fluorescence microscopy and flow cytometry by providing high-intensity fluorescence under specific wavelengths. The mechanism involves the intercalation of the dye into cellular components, where it absorbs and then emits light, allowing for the detailed visualization of cell morphology and structure under a microscope. Furthermore, Eosin Y sodium salt has been employed in photodynamic research where its ability to generate singlet oxygen upon light excitation is studied. This property is explored in non-medical applications, such as the development of photooxidative systems that could potentially be used in environmental applications like water purification or as sensors in various industrial processes. Thus, Eosin Y sodium salt′s role extends beyond simple staining, contributing significantly to advanced research methodologies where visualization and fluorescence are crucial.