2-Aminophenol is an organic compound with the formula C₆H₄(OH)NH₂. Along with its isomer 4-aminophenol, it is an amphoteric molecule and a reducing agent. It is a useful reagent for the synthesis of dyes and heterocyclic compounds.

4-Aminophenol is the organic compound with the formula H₂NC₆H₄OH. Typically available as a white powder,[1] it is commonly used as a developer in black and white film, marketed under the name Rodinal.

Ortho Aminophenol is the organic compound with the formula H₂NC₆H₄OH. Typically available as a white powder,[1] it is commonly used as a developer in black and white film, marketed under the name Rodinal.

P-Aminophenol is the organic compound with the formula H2NC6H4OH. Typically available as a white powder,[1] it is commonly used as a developer in black and white film, marketed under the name Rodinal.