| 2-Pentyl-3-methyl-2-cyclopenten-1-one Basic information |
| Product Name: | 2-Pentyl-3-methyl-2-cyclopenten-1-one |
| Synonyms: | 3-METHYL-2-PENTYL-2-CYCLOPENTEN-1-ONE;3-METHYL-2-PENTYL-2-CYCLOPENTENONE;3-Methyl-2-(n-pentanyl)-2-cyclopenten-1-one;3-methyl-2-pentyl-2-cyclopenten-1-on;3-methyl-2-pentylcyclopent;Jasmone, dihydro-;Tetrahy-dropyrethrone;2-N-AMYL-3-METHYL-2-CYCLOPENTEN-1-ONE |
| CAS: | 1128-08-1 |
| MF: | C11H18O |
| MW: | 166.26 |
| EINECS: | 214-434-5 |
| Product Categories: | |
| Mol File: | 1128-08-1.mol |
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| 2-Pentyl-3-methyl-2-cyclopenten-1-one Chemical Properties |
| 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 |
| Fp | 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 |
| Odor Type | floral |
| JECFA Number | 1406 |
| BRN | 1906471 |
| LogP | 3.25 |
| 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 |
| WGK Germany | 2 |
| RTECS | GY7302000 |
| TSCA | Yes |
| HS Code | 29142990 |
| toxicity | The acute oral LD50 in rats was reported as 2.5 g/kg (1.79-3.50 g/kg) (Keating, 1972). The acute dermal LD50 value in rabbits was reported as 5 g/kg (Keating, 1972). |
| Provider | Language |
|---|---|
| 2-Pentyl-3-methyl-2-cyclopenten-1-one | English |
| SigmaAldrich | English |
| ALFA | English |
| 2-Pentyl-3-methyl-2-cyclopenten-1-one Usage And Synthesis |
| Chemical Properties | 3-Methyl-2-(n-pentanyl)-2-cyclopenten-1-one has a fresh, fruity, jasmine odor with woody and herbal nuances. |
| 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. |
| 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 |
| 2-Pentyl-3-methyl-2-cyclopenten-1-one Preparation Products And Raw materials |
| Raw materials | 6-Benzylaminopurine–>Jasmone–>n-Hendecane |