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Description
The Cell Counting Kit-8 (CCK-8) uses a water-soluble tetrazole salt WST-8 that is bioreduced in live cells to produce a methane dye. This enzymatic reduction relies on intracellular dehydrogenase activity, allowing for a direct correlation between the amount of methane produced and the number of viable cells. The water solubility of the resulting methane simplifies the assay procedure and can be quantified by a microplate reader. This kit is commonly used in biomedical research to assess cell proliferation, viability, and cytotoxicity in vitro. Compared to methods like MTT, XTT, MTS, or WST-1, CCK-8 offers increased sensitivity and ease of use.
Specifications
Cell Counting Kit-8(CCK-8)
| Catalog Number | C6005S | C6005M | C6005L | C6005XL | C6005XXL |
| Product Size | 100T | 500T | 3000T | 10000T | 5×10000T |
| Component | 1 mL | 5 mL | 30 mL | 100 mL | 5×100 mL |
Features
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More Sensitive than MTT, MTS, or WST-1
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No Toxicity to Cell
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Simpler Steps, No organic solvents required
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Stable One Bottle Solution, ready-to-use
Advantages

Figure
1. Principle of the CCK-8 detection

Figure 2. Cell number determination using CCK-8 reagent

Storage
Storage Store at 4℃ and protect from light. Long-term storage can be placed at -20℃. Expiration date marked on the outer packing.
Documents
Product Citation
1. Min Liu, Xiaoling Ren, et al. "Corin: a dual inhibitor for KDM1A/HDAC1, suppresses hepatocellular carcinoma by triggering cuproptosis." Clin Exp Med 26, 33 (2026).
2. Honglei Cheng, Yueju Ding, et al. "TMEM165 promotes glioblastoma progression through epithelial-mesenchymal transition-mediated invasion and temozolomide chemoresistance." International Journal of Biological Macromolecules Volume 335, Part 1, January 2026, 149216
3. Yuanyuan Qin, Hongli Zhou, et al. "AIF1L as a Ferroptosis-Linked Biomarker in Microsatellite States–Driven Colorectal Cancer: Functional and Diagnostic Insights From Multiomics Analysis." Hum Mutat. 2025 Oct 10:2025:6663166 PMID: 41113993
4. Xi Chen, MengXue Zhang, et al. "Diosgenin activates ERa-dependent PI3K/AKT/GSK3b signaling to enhance brain-derived serotonin and alleviate postmenopausal bone loss." J Adv Res. 2025 Nov 24:S2090-1232(25)00949-X PMID: 41297791
5. Rui Wang, Bin Wang, et al. "Apolipoprotein C1 functions as a target of thyroid carcinoma and synergistic effects with promising candidate-cyclopamine." Translational Oncology Volume 63, January 2026, 102617 PMID: 41289702
When can I expect my order to ship?
Most orders are filled and shipped within 2-3 business days from the time they are received.
Our standard shipping usually take 2-5 days.
We also provide express shippping for time-sensitive deliveries.
Email contact@biofargo.com if you have any requirements.

