At least tetrasubstituted benzene derivatives, in which at least one of the groups located at the benzene nucleus is an aminomethyl group, are used for dyeing keratin fibres, in particular human hair.

AROMATIC : Containing the benzene ring as in asphaltic residues of crude mineral oil distillation.

An advantageous feature is the possibility to introduce a wide range of substituents on the benzene ring by standard transformations (like electrophilic aromatic substitutions).

Tricyclobutabenzene is an aromatic hydrocarbon consisting of a benzene core with three cyclobutane rings fused onto it.

The benzene core of the compound can undergo SE reactions with H2SO4, HNO3, halogens and other electrophilic reagents.

The liquid crystal layer contains liquid crystal molecules which contain a multiple bond other than a conjugated double bond of a benzene ring in each molecular structure.

The effect of the OH group makes the aromatic nucleus c. acid is much more active in these reactions compared to the benzene core of C₆H₅COOH (benzoic acid).

In formula (I), wherein R1 is (II) or the like; and R2 is (III) (wherein A is a benzene ring or a heterocycle), or the like.

Added to the washing water as organic solvent is a solvent with one or more isolated benzene nuclei with hydrocarbon side-chains containing at least three carbon atoms.

The benzene core of the compound can undergo SE reactions with H2SO4, HNO3, halogens and other electrophilic reagents.

However, not all of three continuous benzene rings will each have a cyano group, and a benzene ring having a cyano group will not be substituted by three or more benzene rings).

Substitution at the benzene nucleus occurs by halogenation (with an acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.

This colorless solid consists of a benzene ring with hydroxyl, ethoxy, and formyl groups on the 4, 3, and 1 positions, respectively.

It is a colourless solid consists of a benzene ring with hydroxyl, ethoxy, and formyl groups on the 4, 3, and 1 positions, respectively.

This colorless solid consists of a benzene ring withhydroxyl, ethoxy, and formyl groups on the 4, 3, and 1 positions, respectively.