The present disclosure relates to a novel dyeing composition for dyeing human keratinous fibers, such as hair, comprising at least one dicationic diazo dye of formula (I):
[W
1
—N═N—W
2
—W
3
—(W
4
—W
5
)
p
-]
2
-L Formula (I)
as well as the process for dyeing hair using same. Certain compounds of formula (I) are also disclosed herein.
本公开涉及一种用于染色人类角质纤维(如头发)的新型染色组合物,包括至少一种公式(I)的双阳离子偶氮
染料:[W1—N═N—W2—W3—(W4—W5)p-]2-L 公式(I),以及使用该
染料染发的方法。本公开还揭示了公式(I)的某些化合物。