FITC-Dextran (MW 110000) is a compound classified as a fluorescent dye. It is commonly used in biomedical research as a tracer molecule to label and track cells or other biological materials. Composed of fluorescein isothiocyanate (FITC) and dextran, where dextran is a complex carbohydrate derived from starch, this combination forms a stable fluorescent tracer that can be observed under a microscope or quantified using specialized detection instruments.