Figure 3 from The oxidation of p-phenylenediamine, an ingredient used for permanent hair dyeing purposes, leads to the formation of hydroxyl radicals: Oxidative stress and DNA damage in human immortalized keratinocytes.
Synthesis, characterization and biological studies of Schiff base metal complexes derived from 4-aminoantipyrine, acetamide and p-phenylenediamine - ScienceDirect
Spectrophotometric Quantification of Peroxidase with p-Phenylene-diamine for Analyzing Peroxidase-Encapsulating Lipid Vesicles. - Abstract - Europe PMC
Schiff base complexes of Cu(II) and Ni(II) derived from N,N'-bis(salicylidene)-o-phenylenediamine as potential ionophores in the construction of PVC membrane iodide sensors - ScienceDirect
P-phenylenediamined
Synthesis and characterization of a novel Schiff base derived from 2,4,6-trimethyl-m-phenylenediamine with o-vanillin and its metal complexes | Semantic Scholar
Cocrystal hydrate of Bandrowski's base and clotrimazole: a prospective ingredient for hair dye formulations - CrystEngComm (RSC Publishing) DOI:10.1039/D1CE00751C