https://www.hanbiology.com/products/cck-8-assay-kit/ Cell proliferation is the basis of organism growth, development, reproduction and heredity, and is an important life characteristic of organism. Cells usually proliferate by dividing. Cytotoxic is a simple cell-killing event caused by cells or chemicals, which is not dependent on apoptosis or necrosis. Cell Counting Kit-8, referred to as CCK 8 wavelength Kit, an alternative method of MTT assay, is a rapid and highly sensitive detection kit based on WST (water-soluble tetrazolium salt, chemical name: 2-(2-methoxy-4-nitrophenyl)-3-(4-nitrophenyl)-5-(2, 4-disulfobenzene)-2H-tetrazolium monosodium salt) widely used in cell proliferation and cytotoxicity. It can be used for drug screening, cell proliferation assay, cytotoxicity assay, tumor drug sensitivity, and other tests.