delta-Hexyl-delta-valerolactone
undecanoic delta-lactone
CAS: 710-04-3
Molecular Formula: C11H20O2
delta-Hexyl-delta-valerolactone - Names and Identifiers
| Name | undecanoic delta-lactone |
| Synonyms | beta-Undecalactone Delta-Undecalactone delta-Undecanolactone undecanoic delta-lactone 5-hydroxyundecanoicacidlactone 6-hexyltetrahydro-2h-pyran-2-on delta-Hexyl-delta-valerolactone 6-hexyltetrahydro-2H-pyran-2-one 5-Hydroxyundecanoic acid lactone 2H-Pyran-2-one, 6-hexyltetrahydro- 2H-Pyran-2-one, tetrahydro-3-hexyl- 5-hydroxy-undecanoicacidelta-lactone |
| CAS | 710-04-3 |
| EINECS | 211-915-1 |
| InChI | InChI=1/C11H20O2/c1-2-3-4-5-7-10-8-6-9-11(12)13-10/h10H,2-9H2,1H3 |
delta-Hexyl-delta-valerolactone - Physico-chemical Properties
| Molecular Formula | C11H20O2 |
| Molar Mass | 184.28 |
| Density | 0.969g/mLat 25°C(lit.) |
| Boling Point | 152-155°C10.5mm Hg(lit.) |
| Specific Rotation(α) | 0°(25℃, neat) |
| Flash Point | >230°F |
| JECFA Number | 234 |
| Water Solubility | Insoluble in water |
| Vapor Presure | 0.059-0.11Pa at 20-25℃ |
| Appearance | Liquid |
| Specific Gravity | 0.9620.969 |
| Color | Colorless to Almost colorless |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | n20/D 1.459(lit.) |
| Physical and Chemical Properties | Colorless to light yellow liquid, cream and peach-like aroma. Boiling point 152~155 deg C (1.4x 103pa). |
delta-Hexyl-delta-valerolactone - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 2 |
| RTECS | UQ1320000 |
delta-Hexyl-delta-valerolactone - Reference Information
| FEMA | 3294 | 5-HYDROXYUNDECANOIC ACID LACTONE |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Overview | Ding undecalactone is also called δ-undecalactone. Ding undecanolactone has sweet, fruit, milk, cream, butter, ester aroma, wax aroma, coconut aroma and taste. It is a key ingredient in the special fragrance of natural cream. Boiling point 129~130.5 ℃(1 × 133.322Pa), refractive index 1.4564(25 ℃). Made by oxidation of 2-hexylcyclopentanone. It can be used for flavored soft drinks, candy, margarine, ice cream, cold and baked goods. |
| preparation | add 140ml of formic acid and 56g of urea-peroxide adduct into a 500ml three-neck flask equipped with a stirrer, a dropping funnel and a thermometer, and stir and dissolve. 28 grams (0.17mol) of 2-hexylcyclopentanone is added dropwise at room temperature, and the dropwise addition is completed in about 1 hour. Add 168ml of water, stir and layer, the water layer is extracted 3 times with 28ml toluene, and the organic layer is combined. Decompression distillation removes toluene from the organic layer, and the control temperature should not exceed 70 ℃. The residue is crude butyl undecylactone with a purity of 85% and a yield of 96%. The crude product is distilled by a vacuum film distillation device, the temperature is controlled to 128 ℃, the pressure is 1.4kpa, and the distilled product is butyl undecanolactone, the purity is 98%, and the yield is 84%. |
| content analysis | determined by gas chromatography (GT-10-4) with polar column. |
| toxicity | GRAS(FEMA). |
| usage limit | FEMA(mg/kg): beverage 2.0; Ice cream, candy, cereal, 5.0; Baked products 25; Meat, meat sausage, broth 1.0; Milk and dairy products 10.0. |
| use | GB 2760-1996 specified as allowed edible spices. |
| production method | is formed by condensation of hexanal and cyclopentyl ester through dehydration, hydrogenation and internal esterification. |
Last Update：2024-04-10 22:29:15
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