CAS Registry Number

CAS 298-93-1 — MTT (Thiazolyl blue tetrazolium bromide)

MTT (Thiazolyl blue tetrazolium bromide) is a yellow tetrazolium dye widely used in cell viability assays to assess metabolic activity via formazan crystal formation. It converts to a purple insoluble formazan product in live cells, enabling quantitative colorimetric analysis in research and drug discovery. CAS 298-93-1, molecular formula C18H16BrN5S, molecular weight 414.32 g/mol. Store at 2–8 °C. Signal word: Warning. Molekula supplies MTT from research to bulk quantities with full documentation and ISO 9001:2015 traceability.