Cell Counting Kit-8 (CCK-8)

Cell Counting Kit-8 (CCK-8) is designed to detect cell proliferation and cell toxicity based on WST-8 is reduced by dehydrogenases in cells to give an orange colored product (formazan). The amount of the formazan in cells is directly proportional to the number of living cells. Tests confirm that performance equals or exceeds popular CCK-8 kit from other suppliers.

CCK-8 solution

CCK-8 is stable over one year at 0-5C with protection from light. Store it at -20C for longer storage. Repeated thawing and freezing causes an increase in the background, which interferes with the assay. Please store the kit at 0-5C for frequent use.

Since the CCK-8 assay is based on the dehydrogenase activity detection in viable cells, conditions or chemicals that affect dehydrogenase activity in viable cells may cause discrepancy between the actual viable cell number and the cell number determined using the CCK-8 assay.
Be careful not to introduce bubbles to the wells, since they interfere with the O.D. reading.
The incubation time varies by the type and number of cells in a well. Generally, leukocytes give weak coloration, thus a long incubation time (up to 4 hours) or a large number of cells (ca.105 cells/well) may be necessary.
If the color or PH of culture media is changed due to long-time culture, please change the culture media when adding CCK-8.

CCK-8; WST-8; CCK8; WST8