4-Aminophenol CAS # 123-30-8

4-Aminophenol (or para-aminophenol or p-aminophenol) (123-30-8) is the natural compound with the components H2NC6H4OH, belongs to the category of natural compounds recognised as aniline and substituted anilines.
Typically on hand as a white powder, it was once generally used as a developer for black-and-white film, marketed below the identify Rodinal.
Reflecting its barely hydrophilic character, the white powder is reasonably soluble in alcohols and can be recrystallized from warm water. In the presence of a base, it oxidizes readily. The methylated derivatives N-methylaminophenol and N,N-dimethylaminophenol are of business value.
The compound is one of three isomeric aminophenols, the different two being 2-aminophenol and 3-aminophenol.