TRITC-dextran, MW 500000 (Tetramethyl rhodamine isothiocyanate glucan, MW 500000) is a fluorescent dye, with the molecular weight of 500 kD. TRITC-dextran, MW 500000 exhibits an excitation wavelength of 555 nm. TRITC-dextran, MW 500000 is follicular and vessel penetrate, which is dependent on the molecular weight. TRITC-dextran, MW 500000 is utilized in drug delivery for the stability of TRITC over a wide pH range (i.e. pH 2–11) and resistance to photo-bleaching^[1][2][3].