Metallizable disazo compounds having 1, 3-dihydroxybenzene bis-coupling component radicals, iron complexes thereof and mixtures of such iron complexes

An iron complex of a compound of the formula ##STR19## an iron complex of two compounds of said formula or a mixture of such iron complexes,

• wherein D is a monocyclic or bicyclic aromatic diazo component radical of the benzene series containing one --SO.sub.3 M group or is ##STR20## wherein R.sup.1 is hydrogen, C.sub.1-4 alkyl, C.sub.2-4 hydroxyalkyl, methoxy-(C.sub.2-4 alkyl) or ##STR21## wherein R.sub.2.sup.' is hydrogen, chloro, hydroxy, C.sub.1-2 alkyl, C.sub.1-2 alkoxy or --SO.sub.2 NR.sub.o R.sub.o, and
• R.sub.3.sup.' is hydrogen, C.sub.1-2 alkyl, C.sub.1-2 alkoxy, trifluoromethyl, --COOM or --NR"'R"", and
• R" is hydrogen, C.sub.1-4 alkyl, C.sub.2-4 hydroxyalkyl or methoxy-(C.sub.2-4 alkyl), or
• --NR'R" is a saturated nitrogen-containing 5- or 6-membered heterocyclic ring,
• R.sub.5 is hydrogen, chloro or C.sub.1-2 alkyl, and
• X is hydrogen or hydroxy,
• R.sub.1 is hydrogen, methyl or ethyl,
• R.sub.2 is hydrogen, chloro, hydroxy, C.sub.1-2 alkyl, C.sub.1-2 alkoxy or --SO.sub.2 NH.sub.o R.sub.o,
• R.sub.3 is hydrogen, C.sub.1-2 alkyl, C.sub.1-2 alkoxy, --COOM, trifluoromethyl or --NR"'R"", and
• R.sub.4 is hydrogen, chloro or C.sub.1-2 alkyl,
• wherein each R"' and R"" is independently C.sub.1-4 alkyl, C.sub.2-4 hydroxyalkyl, methoxy(C.sub.2-4 alkyl) or carbamoyl(C.sub.1-2 alkyl), or
• --NR"'R"" is a saturated nitrogen-containing 5- or 6-membered heterocyclic ring,
• each R.sub.o is independently hydrogen, C.sub.1-4 alkyl, C.sub.2-4 hydroxyalkyl or methoxy(C.sub.2-4 alkyl), or
• --NR.sub.o R.sub.o is a saturated nitrogen-containing 5- or 6-membered heterocyclic ring, and
• each M is hydrogen or a cation.