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HomeProduct name list2-Pentyl-3-methyl-2-cyclopenten-1-one

2-Pentyl-3-methyl-2-cyclopenten-1-one

Synonym(s):3-Methyl-2-pentyl-2-cyclopenten-1-one

  • CAS NO.:1128-08-1
  • Empirical Formula: C11H18O
  • Molecular Weight: 166.26
  • MDL number: MFCD00036480
  • EINECS: 214-434-5
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-06 15:28:16
2-Pentyl-3-methyl-2-cyclopenten-1-one Structural

What is 2-Pentyl-3-methyl-2-cyclopenten-1-one?

Chemical properties

2-Pentyl-3-methyl-2-cyclopenten-1-one is a colorless, slightly viscous liquid with a typical jasmine odor, resembling that of the naturally occurring (Z)-jasmone. Dihydrojasmone is produced by an acid-catalyzed rearrangement of 4-methyl-??-decalactone, which is readily obtained by radical addition of 2-octanol to acrylic acid.
Dihydrojasmone is used in perfumery in jasmine bases and, more generally, in floral and fruity fragrances.

Chemical properties

3-Methyl-2-(n-pentanyl)-2-cyclopenten-1-one has a fresh, fruity, jasmine odor with woody and herbal nuances.

Occurrence

Has apparently not been reported to occur in nature.

Preparation

Hexyl bromide plus levulinic ester yields a lactone, which is reacted with polyphosphoric acid or phosphorus pentoxide to produce hydrojasmone.

Definition

ChEBI: 3-methyl-2-pentylcyclopent-2-en-1-one is a cyclic ketone.

Taste threshold values

Taste characteristics at 10 ppm: sweet, floral, green, herbal with a citrus nuance.

Synthesis Reference(s)

Canadian Journal of Chemistry, 56, p. 2301, 1978 DOI: 10.1139/v78-379
Journal of the American Chemical Society, 92, p. 7428, 1970 DOI: 10.1021/ja00728a029

Properties of 2-Pentyl-3-methyl-2-cyclopenten-1-one

Boiling point: 120-121 °C12 mm Hg(lit.)
Density  0.916 g/mL at 25 °C(lit.)
refractive index  n20/D 1.479(lit.)
FEMA  3763 | 3-METHYL-2-(N-PENTANYL)-2-CYCLOPENTEN-1-ONE
Flash point: 230 °F
storage temp.  Store at -20°C
solubility  DMSO:100.0(Max Conc. mg/mL);601.45(Max Conc. mM)
form  clear liquid
color  A colourless, slightly oily liquid with a floral-like odour
Specific Gravity 0.914~0.916 (20/4℃)
Odor at 100.00 %. fresh outdoor jasmin myrrh woody spice herbal
JECFA Number 1406
BRN  1906471
CAS DataBase Reference 1128-08-1(CAS DataBase Reference)
NIST Chemistry Reference Dihydrojasmone(1128-08-1)
EPA Substance Registry System 2-Cyclopenten-1-one, 3-methyl-2-pentyl- (1128-08-1)

Safety information for 2-Pentyl-3-methyl-2-cyclopenten-1-one

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H303:Acute toxicity,oral
Precautionary Statement Codes P270:Do not eat, drink or smoke when using this product.
P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P403:Store in a well-ventilated place.

Computed Descriptors for 2-Pentyl-3-methyl-2-cyclopenten-1-one

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