Patent ID: 8268772

Claim:
A permanent hair coloring comprising: an ammoniacal dye solution comprising ammonia and/or an ammonia substitute; and a developer mass, wherein the developer mass includes at least one depot compound of the formula (I) wherein R 1 , R 2 and R 3 , independently, are an organic radical having 1 to 30 carbon atoms, and wherein the compound of the formula (I) releases an aldehyde and two carboxylic acids as a result of hydrolysis or enzymatic cleavage following mixing of the ammoniacal dye solution and the developer mass, said aldehyde released by said compound of formula (I) having a molecular weight of from 100 to 350 g/mol, wherein said aldehyde released by said compound of formula (I) is selected from the group consisting of: phenylacetaldehyde, p-methylphenylacetaldehyde, p-isopropylphenylacetaldehyde, methylnonylacetaldehyde, phenylpropanal, 3-(4-t-butylphenyl)-2-methylpropanal (lilial), 3-(4-t-butylphenyl)propana-1(bourgeonal), 3-(4-methoxyphenyl)-2-methylpropanal (canthoxal), 3-(4-isopropylphenyl)-2-methylpropanal (cymal), 3-(3,4-methylenedioxyphen-yl)-2-methylpropanal (helional), 3-(4-ethylphenyl)-2,2-dimethylpropanal (floralozone), phenylbutanal, 3-methyl-5-phenylpentanal, hexanal, trans-2-hexenal, cis-hex-3-enal, heptanal, cis-4-heptenal, 2-ethyl-2-heptenal, 2,6-dimethyl-5-heptenal (melonal), octanal, 2-octenal, 3,7-dimethyloctanal, 3,7-dimethyl-2,6-octadien-3-al, 3,7-dimethyl-6-octenal (citronellal), 3,7-dimethyl-7-hydroxy-octan-1-al (hydroxycitronellal), nonanal, 6-nonenal, decanal, 2-methyldecanal, 4-decenal, 9-decenal, undecanal, 2-methyldecanal, 2-methylundecanal, 2,6,10-trimethyl-9-undecenal (adoxal), undec-10-enylaldehyde, undec-8-enanal, dodecanal, tridecanal, tetradecanal, anisaldehyde, cinnamal-dehyde, α-amylcinnamaldehyde, α-hexylcinnamaldehyde, methoxy-cinnamaldehyde, isocyclocitral, citronellyloxyacetaldehyde, cortexal-dehyde, cuminaldehyde, cyclamenaldehyde, florhydral, heliotropin, hydratropaldehyde, vanillin, ethylvanillin, benzaldehyde, p-methylbenz-aldehyde, 3,4-dimethoxybenzaldehyde, 3- and 4-(4-hydroxy-4-methyl-pentyl)-3-cycloh-exene-1-carboxaldehyde (lyral), 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde (triplal), I-methyl-3-(4-methylpentyl)-3-cyclohexenecarboxaldehyde (vernaldehyde) or p-methylphenoxyacetaldehyd-e (Xi aldehyde).