Patent classifications
C
CHEMISTRY; METALLURGY
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C09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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C09B
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; , e.g. PIGMENTS; MORDANTS; LAKES
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C09B44/10
containing cyclammonium groups attached to an azo group by a carbon atom of the ring system
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C09B44/101
characterised by the coupling component having an amino directing group
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C09B44/101

Azo direct dyes and method for dyeing hair using these dyes
09587116 · 2017-03-07 · ·

A compound of formula (I) or (II) or (III): ##STR00001##
wherein R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.8 and R.sub.8 are as defined herein. This compound can be used in a composition for the dyeing of fibers.