O-aminophenol (inci)

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

2-hydroxyanilines; Aminophenol; CAS number: 95-55-6; O-Hydroxyanilines

Definition
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O-Aminophenol is a substance used as a permanent hair dye in cosmetic formulations. Permanent hair dyes cause a coloration of the hair matrix (hair keratin). O-aminophenol and its salts belong to the colourless oxidation bases in permanent hair dyeing. These are easily oxidizable, initially colorless dye bases. Principle: The dye bases migrate into the hair shaft swollen by the alkaline medium. There they are oxidized to complex dyes, whereby they chemically bind with the hair keratin. Only through the oxidation of the (colourless) dye bases by the hydrogen peroxide the actual dye is formed.

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Last updated on: 29.10.2020

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