Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): ##STR1## wherein R is hydrogen, hydroxy, nitro, amino, halogen, C.sub.1 to C.sub.5 alkyl or haloalkyl, C.sub.1 to C.sub.5 alkoxy or cyclic alkoxy, C.sub.1 to C.sub.5 hydroxyalkyl and C.sub.1 to C.sub.5 hydroxyalkoxy; Ar is an aromatic group; and y=1 to 3.

Gli intermediari primari per le composizioni in coloring dei capelli per tingersi ossidativo dei capelli sono residui della formula (1): ## del ## STR1 in cui la R è idrogeno, idrossilata, nitro, amminica, alogeno, C.sub.1 ad alchile C.sub.5 o haloalkyl, C.sub.1 ad alcossi alcossi o ciclico di C.sub.5, C.sub.1 a C.sub.5 idrossialchilico e C.sub.1 al hydroxyalkoxy C.sub.5; Ar è un gruppo aromatico; e y=1 a 3.

 
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