CAS Registry Number

CAS 366-29-0 — N,N,N',N'-Tetramethylbenzidine

N,N,N',N'-Tetramethylbenzidine (TMB) is a diamine compound widely used as a chromogenic substrate in ELISA assays and other biochemical detection systems, producing a blue color upon oxidation that shifts to yellow for quantification. It appears as a pale yellow to white crystalline solid with high solubility in organic solvents. Catalogue details: CAS 366-29-0, molecular formula C16H20N2, molecular weight 240.3434 g/mol, stable at ambient storage. Molekula supplies N,N,N',N'-Tetramethylbenzidine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.