4-(5-Isopropenyl-2-methyl-1-cyclopenten-1-yl)-2-butanone
Structural Formula Vector Image
Title: 4-(5-Isopropenyl-2-methyl-1-cyclopenten-1-yl)-2-butanone
CAS Registry Number: 87-45-6
CAS Name: 4-[2-Methyl-5-(1-methylethenyl)-1-cyclopenten-1-yl]-2-butanone
Additional Names: 4-(2-methyl-5-isopropenyl-1-cyclopenten-1-yl)-2-butanone
Trademarks: Pentione
Molecular Formula: C13H20O
Molecular Weight: 192.30
Percent Composition: C 81.20%, H 10.48%, O 8.32%
Literature References: Prepn: Kimel, Sax, US 2799706 (1957 to Hoffmann-La Roche).
Properties: Pale yellow liquid. Citrus-like odor with woody background. d2525 0.9218. bp0.5 72-75°. nD25 1.4800. Freely sol in diethyl phthalate. At least 10% soly in 70% ethanol, in mineral oil and in corn oil.
Boiling point: bp0.5 72-75°
Index of refraction: nD25 1.4800
Density: d2525 0.9218
Use: In perfumery, i.e., in milled soaps, in modified eau de Cologne, in neroli and orange-blossom compositions. Blends well with ionones.

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