One of the most commonly used methods for assessing cell viability is the MTT assay, which measures the ability of living cells to reduce the yellow MTT dye to purple formazan crystals.

Idiosyncratic “hypersensitivity” reactions to sulphonamides ... Toxicity was assessed by using MTT (tetrazolium) as a marker in an automated microtitre plate assay. Over a range of 0.1 to ...