2-Pentyl-3-methyl-2-cyclopenten-1-one
2-Pentyl-3-methyl-2-cyclopenten-1-one
CAS: 1128-08-1
Molecular Formula: C11H18O
2-Pentyl-3-methyl-2-cyclopenten-1-one - Names and Identifiers
2-Pentyl-3-methyl-2-cyclopenten-1-one - Physico-chemical Properties
| Molecular Formula | C11H18O |
| Molar Mass | 166.26 |
| Density | 0.916g/mLat 25°C(lit.) |
| Boling Point | 120-121°C12mm Hg(lit.) |
| Flash Point | 230°F |
| JECFA Number | 1406 |
| Appearance | clear liquid |
| Specific Gravity | 0.914～0.916 (20/4℃) |
| Color | A colourless, slightly oily liquid with a floral-like odour |
| BRN | 1906471 |
| Refractive Index | n20/D 1.479(lit.) |
| Physical and Chemical Properties | Almost colorless to yellowish liquid. Boiling point 230 ℃, relative density 0.915-920, refractive index 1.475-1.481, flash point 130 ℃, soluble in 1-10 volume 70% ethanol or 80% ethanol with the same volume, soluble in oily perfume. The aroma is strong green and floral fragrance, fresh air with fruity aroma, strong green with bitter air, diluted with jasmine fragrance. |
2-Pentyl-3-methyl-2-cyclopenten-1-one - Risk and Safety
| 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). |
2-Pentyl-3-methyl-2-cyclopenten-1-one - References
| FEMA | 3763 | 3-METHYL-2-(N-PENTANYL)-2-CYCLOPENTEN-1-ONE |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | is usually used in trace amounts for flavor formulations. In the fruit aroma-flower aroma type can be adjusted in the fragrance of the gas, such as for jasmine, ylang ylang, lily of the valley, Magnolia, tuberose and other flower flavor. Trace amounts are shared with fruit aroma, which can produce pleasant head aroma. It has the function of enhancing the aroma of bergamot, lavender, Damascene, perilla and other herbs. In the citrus flavor can be good bottom aroma. The product has a strong and long-lasting aroma of jasmine and a strong and mild fruit aroma. It is often used as a fragrance raw material for cosmetic essences, and the dosage of the product can reach 3-5% in the purplish blue essence. for the preparation of Jasmine and other floral flavor There are a variety of synthetic methods, catalytic reduction of jasmine, or 2, 5-11anedione in sodium hydroxide ethanol solution condensation, or from the acrylic acid ester and the heavy octanol in peroxide catalyzed condensation, followed by dehydration and rearrangement, can be prepared by dihydrojasmine. The method of 11 alkanedione. The 2, 5-11anedione, ethanol, 2% sodium hydroxide solution was heated to reflux for 6h under the protection of nitrogen, the reaction solution was concentrated and extracted with petroleum ether, and the extract was distilled off under reduced pressure, the fractions from 113 to 115 °c (1.33kPa) were collected to obtain the final product. |
| production method | There are a variety of synthetic methods, the catalytic reduction of jasmine, or 2, the condensation of 5-11 alkanedione in sodium hydroxide solution in ethanol, or condensation of acrylate with dioctanol under the catalysis of peroxide, followed by dehydration and rearrangement, can be obtained from dihydrojasmine. The method of 11 alkanedione. The 2, 5-11anedione, ethanol, 2% sodium hydroxide solution was heated to reflux for 6h under the protection of nitrogen, the reaction solution was concentrated and extracted with petroleum ether, and the extract was distilled off under reduced pressure, the fractions from 113 to 115 °c (1.33kPa) were collected to obtain the final product. |
Last Update：2024-04-09 20:49:11
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CAS: 1128-08-1
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