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SKU AR1156
Pack size 1 kit (for 500 tests)
Kit Components MTT labeling reagent 5ml
Formazan solubilization solution 55ml
Applications Measurement of cell proliferation in response to growth factors, cytokines and nutrients.
Measurement of cytotoxicity
To study cell activation


Product Name MTT Cell Proliferation and Cytotoxicity Assay Kit
Description Boster’s MTT Cell Proliferation Assay Kit provides a simple method for determination of cell number using standard microplate absorbance readers. Determination of cell growth rates is widely used in the testing of drug action, cytotoxic agents and screening other biologically active compounds. Several methods can be used for such determinations, but indirect approaches using fluorescent or chromogenic indicators provide the most rapid and large scale assays. The non-radioactive, colorimetric assay system using MTT was first described by Mosmann. The assay is designed for the spectrophotometric quantification of cell growth and viability without the use of radioactive isotopes. The MTT assay involves the conversion of the water soluble MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) to an insoluble purple formazan crystals. The formazan crystals formed are then solubilized, and the concentration of resulting colored solution determined by optical density at 570 nm. The result is a sensitive assay with excellent linearity up to approximately 106 cells per well.
Application Measurement of cell proliferation in response to growth factors, cytokines and nutrients
Measurement of cytotoxicity
To study cell activation
Pack Size 1 kit (for 500 tests)
Kit Components MTT labeling reagent 5ml
Formazan solubilization solution 55ml


Product Type Ready to use
Form Supplied Solution
Physical State Liquid
Pack Size 1 kit (for 500 tests)
Molecular formula C18H16BrN5S
Molecular weight 414.32
CAS name/number 2H-Tetrazolium, 2-(4,5-dimethyl-2-thiazolyl)-3,5-diphenyl-, bromide 298-93-1
Storage Upon receipt store MTT labeling reagent at -20°C. Protect from light. It is stable at -20°C for one year. Store Formazan solubilization solution at room temperature. It is stable at room temperature for one year.

Important Product Information

  • The culture conditions used to grow the cells can affect the results and must be taken into consideration when analyzing the data. The age of the cultures, number of passages and details of the growth medium can all be important factors.
  • For Formazan solubilization solution, frozen block or precipitates may form during shipment or storage, in which case the container should be warmed to +37°C and thoroughly mixed.
  • After thawing, the MTT labeling reagent may be stored protected from light at 4°C for up to 4 weeks, in which case a sterile filtration of the reagent is recommended.
  • The presence of phenol red in the final assay samples can seriously affect results. We recommend that the cells be cultured in medium free of phenol red, if possible.
  • MTT is oncogenic. Please wear gloves to operate.
  • Protocols

    Check datasheet for details:

    MTT Cell Proliferation and Cytotoxicity Assay Kit Images

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    MTT Cell Proliferation and Cytotoxicity Assay Kit
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    He YM, Zhang ZL, Liu QY, Xiao YS, Wei L, Xi C, Nan X. J Cell Mol Med. 2018 May;22(5):2569-2579. doi: 10.1111/jcmm.13499. Epub 2018 Mar 8. Effect of CLIC1 gene silencing on proliferation, migration, invasion and apoptosis of human gallbladder cancer cells
    Yujie Jiang,1,2,* Yi Zeng,3,* Xia Huang,1,2 Yueqiu Qin,4 Weigui Luo,2 Shulin Xiang,5 Suren R. Sooranna,6 and Liao Pinhu Am J Physiol Lung Cell Mol Physiol. 2016 Dec 1; 311(6): L1023–L1035. Published online 2016 Oct 7. doi: 10.1152/ajplung.00043.2016 Nur77 attenuates endothelin-1 expression via downregulation of NF-κB and p38 MAPK in A549 cells and in an ARDS rat model

    Customer Q&As

    Q: Will using DMSO to solubilize the formazan crystals affect the cells since it is toxic at high concentrations?
    A: DMSO will not affect the cells.