Compounds, and agents for oxidatively changing the color of keratinic fibers that include such compounds, in particular human hair, in a cosmetic carrier. The compounds are at least one oxidation dye precursor product of formula (I) and/or physiologically acceptable salt thereof, ##STR00001## in which R1, R2, R3, R4 independently of one another, stand for a hydrogen atom, a C.sub.1-C.sub.6 alkyl group, a C.sub.2-C.sub.6 alkenyl group, a hydroxy-(C.sub.1-C.sub.6)-alkyl group, a polyhydroxy-(C.sub.2-C.sub.6)-alkyl group, or a C.sub.1-C.sub.6-alkoxy-C.sub.2-C.sub.6-alkyl group, n stands for an integer from 2 to 6, and Z stands for an aromatic or aliphatic heterocycle or for an aromatic or aliphatic carbocycle.

The present invention relates to a composition for dyeing keratin fibers, comprising: a) one or more liquid fatty substances; b) one or more amphoteric surfactants of formula (I) below: R.sub.aC(O)NHCH.sub.2(CH.sub.2).sub.nN(B)(B) in which: B represents the group CH.sub.2CH.sub.2OX; B represents the group (CH.sub.2).sub.zY, with z=1 or 2; X represents the group CH.sub.2C(O)OH, CH.sub.2C(O)OZ, CH.sub.2CH.sub.2C(O)OH or CH.sub.2CH.sub.2C(O)OZ, or a hydrogen atom; Y represents the group C(O)OH, C(O)OZ, CH.sub.2CH(OH)SO.sub.3H or the group CH.sub.2CH(OH)SO.sub.3Z; Z and Z represent, independently of each other, a cationic counterion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; R.sub.a, represents a C.sub.10-C.sub.30 alkyl or alkenyl group derived from an acid R.sub.aC(O)OH, which is preferably present in copra oil or in hydrolyzed linseed oil, an alkyl group, especially a C.sub.17 group and its iso form, or an unsaturated C.sub.17 group and n represents an integer ranging from 1 to 10 and preferably from 1 to 5, or quaternized forms thereof; c) one or more sulfate or sulfonate surfactants; d) one or more oxidation dye precursors. The present invention also relates to a process using this composition and to a multicompartment device that is suitable for performing the said process.

The invention relates to a composition comprising: i) at least one oxidation base, preferably of heterocyclic and/or para-phenylenediamine type; and ii) at least one heteroaryl coupler of formula (I), with R.sup.1, R.sup.2, R.sup.3, A and X as defined in the description. The invention also relates to a process for dyeing keratin fibres using ingredients i) and ii); to a kit comprising ingredients i) and ii); and to the use of ingredient i) combined with ii) for dyeing keratin fibres. The composition of the invention leads to particularly powerful, chromatic and sparingly selective colourings. ##STR00001##

Agent for the oxidative dyeing of keratinous fibers is provided herein. The agent includes in a cosmetic carrier (A) 1-(2-Hydroxyethyl)-4,5-diaminopyrazole and/or one of the physiologically-tolerated salts thereof. The agent further includes (B) 2,6-dihydroxy-3,4-dimethylpyridine. The agent also includes (C) p-phenylendiamine, toluene-2,5-diamine, 2-(2,5-diaminophenyl)ethanol and/or one of the physiologically-tolerated salts thereof.

UV-absorbing compounds are provided that have at least one reactive hydrogen. These compounds have structures:

##STR00001##

wherein the generic notations have meanings as described herein. Also provided are formulations comprising a UV-absorbing compounds.

The present disclosure relates to a cosmetic product for dyeing keratin fibres which contains two separate powdered preparations (A) and (B), which are each packaged in a water-soluble film, and to a method for dyeing keratin fibres using said product. The cosmetic product of the present disclosure does not require the use of free hydrogen peroxide.

The present invention relates an aldehyde dehydrogenase inhibitor for use in the treatment or prevention of fibrosis.

A method for successively performing hair dyeing and hair straightening, the method including the steps of: performing dyeing on hair; applying, to the hair immediately after being subjected to dyeing, a reducing first agent containing a basic dye and/or an HC dye, and leaving the hair for a certain time, thereby performing reduction on cystine bonds; shaping the hair that has been subjected to reduction into a straight configuration; and applying an oxidizing second agent to the hair that has been shaped into a straight configuration, and leaving the hair for a certain time, thereby performing oxidation for reforming the cystine bonds.

An oxidative dyeing composition A for keratin fibers, including a) a salt of 1,4-diamino-2-methoxymethyl-benzene, and c) an alkalizing agent which is at least one selected from inorganic alkalizing agents, organic alkalizing agents, salts thereof, or mixtures thereof. The salt of 1,4-diamino-2-methoxymethyl-benzene is at least one selected from a sulfate salt, a hydrogen sulfate salt, a hydrochloride salt, a hydrobromide salt, a nitrate salt, a phosphate salt, a hydrogen phosphate salt, a dihydrogen phosphate salt, a methosulfate salt, a citrate salt, a succinate salt, a tartrate salt, a lactate salt, a tosylate salt, a benzenesulfonate salt, an acetate salt, or mixtures thereof.

A composition for dyeing of keratin fibers, containing a) 1,4-diamino-2-methoxymethyl-benzene, b) an oxidative dye coupler or oxidative dye precursor different from the 1,4-diamino-2-methoxymethyl-benzene, and c) a direct dye which is at least one selected from HC Blue 18, HC Red 18, HC Yellow 16, salts thereof, or mixtures thereof. A method for dyeing keratin fibers.