2,4-bis(1,1-dimethylethyl)-6-[(2-nitrophenyl)diazenyl]phenol, 2,4-di-t-butylphenol-6(2'-nitrophenylazo)phenol, EINECS 257-715-8, 2,4-bis(1,1-dimethylethyl)-6-(2-nitrophenylazo)phenol, 2,4-bis(tert-butyl)-6-[(2-nitrophenyl)azo]phenol, 2,4-di-t-butyl-6-(2'-nitrophenylazo)phenol