4-(Methylamino)phenol sulfate, is a is a popular photographic developer used in black & white photography. It is also an excellent developing agent for most continuous tone developer applications, and it has been widely used in published developer formulas as well as commercial products.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.