Nitro-p-phenylenediamine derivatives, processes for their preparation and coloring agents containing these for use on keratin fibres
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United States of America Patent
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Nov 26, 1991
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N/A
app pub date -
Apr 25, 1990
filing date -
May 26, 1989
priority date (Note) -
Expired
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Abstract
The invention relates to compounds of the general formula I ##STR1## wherein R.sup.1 and R.sup.2 independently of one another each represent a hydrogen atom, a (C.sub.1 -C.sub.2) alkyl group, a hydroxy (C.sub.2 -C.sub.3) alkyl group or a 2,3-dihydroxypropyl group and X is a florine atom or a trifluoromethyl group, processes for their preparation and aqueous hair coloring agents containing these compounds.
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