Title: Cyclopentanone
CAS Registry Number: 120-92-3
Additional Names: Ketocyclopentane; ketopentamethylene; adipic ketone
Molecular Formula: C5H8O
Molecular Weight: 84.12
Percent Composition: C 71.39%, H 9.59%, O 19.02%
Literature References: Prepd by heating adipic acid to 285-295° in the presence of barium hydroxide, distilling, extracting with ether and fractionating: Thorpe, Kon, Org. Synth. coll. vol. I, 192 (2nd ed., 1941).
Properties: Liquid. Agreeable odor, somewhat like peppermint. d418 0.9509. mp -58.2°. bp760 130.6°; bp10 23-24°. Flash pt 85°F. nD20 1.4366. Slightly sol in water. Miscible with alc, ether. Polymerizes easily, esp in presence of acids.
Melting point: mp -58.2°
Boiling point: bp760 130.6°; bp10 23-24°
Flash point: Flash pt 85°F
Index of refraction: nD20 1.4366
Density: d418 0.9509
Cyclopenthiazide Cyclopentobarbital Cyclopentolate Cyclophosphamide Cyclopropane

CAS number 120-92-3 YesY
PubChem 8452
ChemSpider 8141 YesY
UNII 220W81TN3S YesY
KEGG C00557 YesY
ChEBI CHEBI:16486 YesY
RTECS number GY4725000
Jmol-3D images Image 1
Molecular formula C5H8O
Molar mass 84.12 g/mol
Appearance clear, colorless liquid
Odor peppermint-like
Density 0.95 g/cm3, liquid
Melting point −58.2 °C; −72.8 °F; 215.0 K
Boiling point 130.6 °C; 267.1 °F; 403.8 K
Solubility in water Slightly soluble
MSDS Cyclopentanone
Flash point 26 °C; 79 °F; 299 K
Related compounds
Related ketones cyclohexanone
Related compounds cyclopropane
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Cyclopentanone is a cyclic ketone.