1,3-Dihydroxybenzene derivatives and colorants containing...

Details 1,3-Dihydroxybenzene derivatives and colorants containing... 1,3-Dihydroxybenzene derivatives and colorants containing...

2006-10-24

2006-10-24

Elhilo, Eisa (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

C008S406000, C008S410000, C008S412000, C008S424000, C008S570000, C008S571000, C008S576000, C008S577000, C548S400000, C549S029000, C549S200000

Reexamination Certificate

active

07125428

ABSTRACT:
1,3-Dihydroxybenzene derivatives of general formula (I) or (Ia) or physiologically tolerated, water-soluble salts thereofwherein R′1 denotes a substituted pyridyl group, a pyrimidyl group, a group of formula (IIa) or (IIIa)and the dyeing agents for keratin fibers containing these compounds.

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