Nitro-p-phenylenediamine derivatives, processes for their preparation and coloring agents containing these for use on keratin fibres
US5163970A · kind A · utility
0Cited by
5References
10Claims
0Family size
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Key dates
| Filing date | Aug 16, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Aug 16, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C215/16
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compounds of the formula I are described: ##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 fluorine atom, with the proviso that when R.sup.1 or R.sup.2 is hydrogen then the other is not a hydroxy (C.sub.2) alkyl group; processes for their preparation and aqueous hair coloring agents containing these compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.