Abstract: The present disclosure relates to monocationic monochromophoric compounds of formula (I) and (II) and dyeing compositions and multicompartment devices comprising monocationic monochromophoric compounds of formula (I) and (II). The disclosure also relates to methods for preparing monocationic monochromophoric compounds of formula (I) and (II), and also to methods for dyeing comprising applying monocationic monochromophoric compounds of formula (I) and (II) to keratin fibers.

Abstract: The present disclosure relates to polycationic monochromophoric hydrazone compounds of following formula (I): wherein W1 is a heteroaromatic radical comprising 5 or 6 ring members, optionally condensed with an aromatic ring comprising 6 ring members, comprising a quaternized nitrogen atom and optionally another heteroatom which may or may not be identical to nitrogen; X, which may or may not be identical, is a nitrogen atom or a CR2 group; Z is a cationic group comprising at least one quaternized nitrogen atom. 1The present disclosure also relates to a composition for dyeing human keratin fibers comprising the polycationic compounds disclosed herein, and to a dyeing process using the composition of the present disclosure, and ever further to multicompartment device.

Abstract: Disclosed herein are dissymmetrical cationic diazo compounds comprising a 2-pyridinium group and a cationic or non-cationic linker. Also disclosed herein are dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, a method for coloring keratin fibers comprising contacting the keratin fibers with such dyeing compositions, and a device comprising a plurality of compartments.

Abstract: The present disclosure relates to a novel family of dicationic bis-hydrazone compounds that may be used as direct dyes, and to a dye composition for dyeing keratin fibers, for example, human keratin fibers such as the hair, comprising, in a suitable dyeing medium, at least one such compound. Also disclosed are dyeing processes implementing this composition and uses thereof.

Abstract: Disclosed herein are symmetrical cationic diazo compounds chosen from compounds of formula (I), their resonance forms, their acid addition salts, and their solvates: Also disclosed herein are dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, a method of coloring keratin fibers comprising contacting the keratin fibers with such compositions, and a device comprising a plurality of compartments.

Abstract: The present disclosure relates to symmetrical cationic diazo compounds of formula (I) below, their resonance forms, and also their acid addition salts and their solvates: wherein W1 radicals, which are identical, are chosen from a halogen atom, or an —NR4-Ph-NR5R6, —NR4-Ph-OR7, —O-Ph-OR7 or —O-Ph-NR5R6 group or else an —NR5R6 or —OR7 group with certain provisos; L, a non-cationic linker connecting the two identical azo chromophores, is chosen from a covalent bond; an optionally substituted C1-C40 alkyl radical optionally interrupted by a (hetero)cycle, the alkyl radical being optionally interrupted by at least one heteroatom or group comprising at least one heteroatom or an optionally substituted phenyl radical. The disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and a device comprising a plurality of compartments.

Abstract: A dye composition comprising at least one mixed dye comprising at least two chromophore chosen from azine and (hetero)aromatic nitro compounds, optionally associated with at least one chromophore chosen from methine and carbonyl compounds; a process for dyeing keratin fibers, for example, human keratin fibers, such as the hair, using the composition, a multi-compartment device comprising the composition; and the abovementioned mixed dyes.

Abstract: Disclosed herein are a dye composition comprising at least one mixed dye comprising at least one chromophore chosen from chromophores of the azo family and the tri(hetero)arylmethane family; and the mixed dyes. Further disclosed herein are a process for dyeing keratin fibers, such as human keratin fibers, using the composition, and a device comprising the composition.

Abstract: The present invention relates to a dye composition including at least one mixed dye containing at least one chromophore of methine or carbonyl type or their combinations. The invention furthermore relates to a process for dyeing keratin fibers, especially human keratin fibers, such as the hair, using the composition, and also to a suitable kit. The invention also relates to the abovementioned mixed dyes per se.

Abstract: The present disclosure relates to cationic diazo dye compounds of formula (I): Dye1-LK-Dye2, ??(I) dye compositions comprising the direct dye compounds, and also to a process for dyeing keratin fibers using this composition and a multi-compartment kit.

Abstract: The present disclosure relates to a cationic diazo compound of formula (I): Dye1-LK-Dye2 wherein Dye1 and Dye2 are such that the compound of formula (I) is not symmetrical, and are chosen from: The disclosure also relates to dye compositions comprising compounds of formula (I) as direct dye, and further relates to a process for dyeing keratin fibers using the compositions disclosed herein and also to a multi-compartment device.

Abstract: The present disclosure relates to compounds used as direct dyes, and dyeing compositions comprising such compounds. The disclosed compounds have the formula A-L-B, wherein A and B are chosen from arylazoimidazolium coloring functional groups, and L is a linker comprising at least one cationic group C. The disclosure also relates methods of using such compositions for coloring keratin fibers, such as the hair.

Abstract: The present disclosure relates to cationic diazo compounds chosen from those of formula (I) and the acid addition salts thereof: Dye1-LK-Dye2 (I); and to dye compositions comprising the the compounds as direct dye, and also to a process for dyeing keratin fibers using this composition and a multi-compartment device.

Abstract: The present disclosure relates to symmetrical cationic diazo compounds of formula (I), the resonance forms, and also the acid addition salts and/or the solvates thereof: The present disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and a multi-compartment kit containing such compositions.

Abstract: Disclosed are cationic diazo compounds of the following formula Dye1-LK-Dye2??(I) in which Dye1 and Dye2 represent: Also herein disclosed are dye compositions comprising the cationic diazo compounds as direct dye, a process for dyeing keratin fibers using this composition, and a multi-compartment device.

Abstract: A subject-matter of the disclosure is a novel composition for the dyeing of human keratinous fibres, for example, the hair, comprising a monocationic monoazo dye of formula (I) W1-N?N—W2-NW3-W4-W5, the dyeing processes employing it, the use of the dyes of formula (I) as direct dyes and the novel compounds of formula (I).

Abstract: The invention concerns a novel dyeing composition for dying keratinous fibers, in particular human hair, comprising a dicationic monoazo dye, and the dyeing method using said composition and the novel compounds of formulae (I) or (II).

Abstract: The invention concerns a dyeing composition for keratinous fibres, in particular human keratinous fibres and more particularly hair, comprising a dicationic diazo dye of formula (I), as well as the dyeing composition using same. The invention also concerns the novel compounds of formula (I).