The MAX-Blue™ Cell Viability Assay Kit (resazurin) is a single-component ready-to-use solution. It is a cell viability test kit applicable to both absorbance and fluorescence measurement according to the usage type of the instrument. Fluorescence measurement shows a higher sensitivity than other tetrazolium salt measurement methods. The redox dye used in the product is reduced by metabolically active cells. Reduced dye can be measured at fluorescence (Ex/Em = 570/585nm) or absorbance (570nm). The detection sensitivity can be measured through a stable linear calibration value from about 102 to 105 cells. Since the dye does not forcibly interfere with the electron transfer flow of normal cells due to a very low reduction potential of the dye, it can be used in conjunction with other experiments.