Use of sulphurous metaaminophenols of formula (I) in which Z is a C1?-C18? alkyl radical, an aryl radical, an aralkyl in which the alkyl radical has from 1 to 6 carbon atoms, a C1?-C6? monohydroxyalkyl radical, a C2?-C6? polyhydroxyalkyl radical, an aminoalkyl radical of formula (I') in which n is an integer of between 1 and 6 inclusive, R1? and R2?, the same or different, are a hydrogen atom or a C1?-C4? alkyl radical, a C1?-C4? hydroxyalkyl, a C2?-C6? acyl; R is a hydrogen atom, a C1?-C6? alkyl radical, a C1?-C6? monohydroxyalkyl or a C2?-C6? polyhydroxyalky radical, a C1?-C6? monocarbamylalkyl, a C1?-C6? dicarbamylalkyl, a C1?-C6? aminoalkyl, a C1?-C6? acyl, a C2?-C6? carbalkoxy, a carbamyl ou a carbamyl C1?-C6? monoalkyl, R' is a hydrogen atom, a C1?-C4? alkyl radical, a C1?-C4? thioalkyl or a C1?-C4? alkoxy. The invention also concerns the corresponding acid salts of said sulphurous metaaminophenols for use in dyeing keratinic fibers such as hair.
USE OF SUPLHUROUS METAAMINOPHENOLS FOR DYING KERATINIC FIBRES, TINCTORIAL COMPOSITIONS AND NOVEL COMPOUNDS