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Project at a Glance Contents on the CD ROM
  • 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.
  • It also has low toxicity and, unlike some other developers, does not cause dermatitis upon skin contact.
  • One of the most novel properties of Phenidone is the efficiency effected because it is re-activated by Hydroquinone.
  •  Phenidone's developing properties are dependent on the pH of the solution.
  • 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.
  • Ilford claims "That a Phenidone -Hydroquinone developer is More Effective Than Any Other Available Developer For Forced Development Where Last-Ditch Exposures With Minimal Highlight Blocking Is Desired."
  • Phenidone gives no fog with Low-Speed emulsion papers. However, with high speed emulsions it may produce fog.
  • Benzotrlazole added to a paper developer compound with Phenidone, not only prevents fog, but also has the effect of modifying the Tone Of The Silver Image so that Cold Blue-Black Tones are produced.
  • The final oxidation product of a Phenidone -Hydroquinone developer is COLORLESS, which reduces, but does not eliminate, the staining of fingers and clothes. This is due in part to the Hydroquinone.
General Information
  • Introduction Of Phenidone
  • Phenidone As a Dual Inhibitor


  • Phenidone: SC-200508
  • Phenidone B
  • Phenidone A


  • Phenidone B
  • 1-Phenyl-3-Pyrazolidone
  • 1-Phenyl-4-methyl-3-pyrazolidone
  • Arista Premium Paper Developer
  • Phenidone
Company Profiles 
  • Company Of India
  • Company Of Haryana
  • Chinese Phenidone B Report


  • Diazo-Type Recording Material Comprising A 1-phenyl-3-Pyrazolidone(Pheni-done) As An Anti-Oxidant
  • High Contrast Continuous Tone Developer And Process Of Use
  • Method And Apparatus For Rapid Determination Of 1-Phenyl-3-pyrazolidone(Phenidone) In Developing Solutions
  • Photographic Chemical Formula And Process
  • Silver Halide Color Photographic Light-Sensitive Material, Phenidone Compound For Use Therein, And Method Of Producing the Same



  • Effect of eicosanoid biosynthesis inhibitors 
  • Effect of Steroids and Nonsteroidal Agents
  • Degradation Of Medical X-Ray Film By Advanced Oxidation Process
  • Octadecanoid signalling activation in response to insect elicitors and green leaf volatiles in Zea mays


  • Indian Manufacturers Of Phenidone
  • Suppliers For CAS 92-43-3
  • Phenidone(92-43-3) Suppliers
  • Phenidone B CAS 2654-57-1


  • Floral Lipoxygenase: Activity during Senescence
    and Inhibition by Phenidone
  • Expression induced by kainic acid in rat hippocampus
  • The Effect oF Mixed Inhibitors of Cyclo-Oxygenase and Lipooxygenase
  • Lipoxygenase Inhibition decreases Neointimal formation following
    vascular injury
  • Prostaglandin Production in Response to a Bacterial
    Infection in True Armyworm Larvae


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