Phenidone

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Phenidone
Phenidone.svg
Phenidone-spaceFill.png
Identifiers
CAS number 92-43-3 YesY
PubChem 7090
ChemSpider 6823 YesY
EC number 202-155-1
ChEMBL CHEMBL7660 YesY
Jmol-3D images Image 1
Properties
Molecular formula C9H10N2O
Molar mass 162.19 g mol−1
Appearance Crystal leaflets or needles
Melting point 121 °C (250 °F; 394 K)
Solubility in water 10 g/100 ml at 100 °C
Solubility in ethanol 10 g/100 ml (hot)
Solubility in diethyl ether practically insoluble
Hazards
MSDS External MSDS
R-phrases R20 R22
Main hazards Harmful if swallowed
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

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.[1]

Phenidone is Ilford's trademark for this material which was first prepared in 1890. It was not until 1940 that Dr. J. D. Kendall, in the laboratories of Ilford Limited, discovered the photographic reducing properties of this chemical. However, large scale manufacturing of the compound did not become feasible until 1951.[citation needed]

Preparation[edit]

Phenidone is prepared by heating phenyl hydrazine with UMB66.[1]

References[edit]

  1. ^ a b Merck Index of Chemicals and Drugs, 9th ed. monograph 7115