Definition of Metol in English:

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Pronunciation: /ˈmeˌtôl/ /-ˌtōl/


A soluble white compound used as a photographic developer.
  • A sulfate of 4-methylaminophenol (chemical formula: CH3NHC6H4OH)
Example sentences
  • Developing agents most readily available were metol, hydroquinone, and Phenidone.
  • This is because they mostly contain two developing agents: either phenidone or metol, which effectively develop the lighter image tones, with hydroquinone, which is responsible for the heavier densities.
  • As I have explained in my Print Solarization article, the best developer for the Sabatier effect is one that contains metol only.


Late 19th century: from German, arbitrarily named by the inventor.

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