1,4-Benzenediamine; p-Phenylenediamine; (4-Aminophenyl)amine; 1,4-Diaminobenzene; 1,4-Diaminobenzol; 1,4-Phenylenediamine; 4-Aminoaniline; 4-Phenylenediamine; BASF Ursol D; Benzofur D; C.I. Developer 13; Developer PF; Durafur Black R; Fouramine D; Peltol D; Fourrine 1; Fourrine D; p-Diaminobenzene; PPD|

A hair dye component, paraphenylenediamine, as a contact allergen for treatment of inflammatory diseases.