Keratin Dyeing Compounds, Keratin Dyeing Compositions Containing Said Compounds, and Use Thereof
Compositions for the oxidative dyeing of keratin fibers, comprising a medium suitable for dyeing and at least one 3-substituted pyrazole keratin dyeing compound and derivatives thereof. A method for oxidative dyeing of keratin fibers, comprising applying
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(2009/12/05)
Oxidation hair dye composition based on 4,5-diaminopyrazole and m-phenylenediamine derivatives
The oxidation hair dye composition contains from 0.01 to 4.0 percent by weight of a developer substance including at least one diaminopyrazole of the formula (I) STR1 wherein R1 is selected from the group consisting of hydrogen, an alkyl group
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(2008/06/13)
Process for the synthesis of 4,5-diaminopyrazole derivatives useful for dyeing hair
The subject matter of the present invention is directed to a process for producing 4,5-diaminopyrazole derivatives of the general formula (I) STR1 where R1 and R2 independently designate hydrogen, a C1 - to C6 -
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(2008/06/13)
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