Thursday, March 29, 2012


  • Phenidone (1-phenyl-3-pyrazolidinone) is an organic chemical compound whose primary use is as a photographic developer.
  • It has five to ten times the developing power as Metol.
  • Phenidone gives no fog with Low-Speed emulsion papers. However, with high speed emulsions it may produce fog.
  • Phenidone is slightly soluble in cold water, but as the temperature of the solution increases Phenidone becomes more soluble, It is readily soluble in both acid and alkaline solutions.

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