3,3',5,5'-Tetramethyl(1,1'-biphenyl)-4,4'-diamine--hydrogen chloride--water (1/2/1)

This compound is a dihydrochloride hydrate salt of a diamine, commonly used as a research reagent in peroxidase assays. It features an aromatic diamine core structure with multiple methyl substituents, contributing to its reactivity in oxidative studies.