- A colorless crystalline mixture, C6H3(NH2)2OH·2HCl, utilized as a photographic designer.
- A salt of a diamino phenol, C6H3(OH)(NH2)2, used as a developer.
- A trade-name for hydrochlorid of diaminophenol, utilized as a developer in photography. Its formula is C6H3OH(NH2)2.2HCl. The free base is unstable.