N,N Bis Hydroxyethyl PPD sulfate, 2-[(4-aminophenyl)(2-hydroxyethyl)amino]ethanol sulphate, N,N-Bis(hydroxyethyl)-p-phenylenediamine sulfate, 2,2'-[(4-aminophenyl)imino]bis-ethano sulfate, 2,2'-[(4-Aminophenyl)imino]bisethanol sulfate, N4,N4-bishydroxyethyl-p-phenylenediamine sulfate, Rodol Gray HED, Rodol Grey HED, N,N-DI(2,2-ETHOXYL)-P-PHENYLENEDIAMINE SULFATE, JAROCOL BHP