Description
Thiazolyl blue tetrazolium bromide (often called MTT) is a common dye used in Cell Proliferation assays or Cell Growth assays.   MTT is converted to water-insoluble, dark blue MTT-formazan by mitochondrial dehydrogenases of living cells.  The intensity of the color can then be measured colorimetrically at a wavelength of 570 nm. 
 Product Specifications:
 Methylthiazolyldiphenyl-tetrazolium bromide,
 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide 
 MTT 
 Formula: C18H16BrN5S 
 MW: 414.32 g/mol 
 Handling/Storage: Store dark at 4°C, protect from light/ air, keep dry.
 Soluble in Water or PBS up to 5 mg/ml, and in Ethanol at 20 mg/ml. 
 PubChem Chemical ID: 64965