P-diaminobenzene derivatives and dyes containing said compounds

p-Diaminobenzene derivatives of general formula (I) or physiologically tolerated, water-soluble salts thereof

• 5
• wherein R1, R2, R3, R4, R5, R6 and R7
• independently of each other denote hydrogen, a C1-C6-alkyl group, a C1-C4-hydroxyalkyl group, a C2-C4-dihydroxyalkyl group or a C1-C4-alkoxy-(C1-C4)-alkyl group, or R1 and R2 or R3 and R4 or R5 and R6 form a four-membered to eight-membered aliphatic ring, and wherein at least two of the R1 to R7 groups denote hydrogen;
• R8 stands for hydrogen or a C1-C4-alkyl group;
• and
• R9, R10 independently of each other denote hydrogen, a hydroxyl group, a halogen atom, a C1-C4-alkyl group, a C1-C4-hydroxyalkyl group, a C1-C4-aminoalkyl group, an amino group, a C1-C2-alkylamino group or a C1-C4-alkoxy group: