Fluorescent labeling dyes are reactive organic molecules designed for covalent attachment to biomolecules such as antibodies, proteins, and nucleic acids. Our portfolio includes classic dyes (e.g., FITC, TRITC) and advanced cyanine derivatives (CY3, CY5, CY7), offering a broad spectrum of excitation/emission profiles. Characterized by high molar extinction coefficients and superior quantum yields, these dyes are engineered with reactive groups (NHS ester, maleimide) for efficient conjugation. They are essential tools for flow cytometry, immunofluorescence, fluorescence in situ hybridization (FISH), and other high-sensitivity detection and imaging applications, providing reliable and consistent performance.