p-Menth-8-en-2-one,trans-
(+)-Dihydrocarvone
CAS: 5524-05-0
Molecular Formula: C10H16O
p-Menth-8-en-2-one,trans- - Names and Identifiers
p-Menth-8-en-2-one,trans- - Physico-chemical Properties
| Molecular Formula | C10H16O |
| Molar Mass | 152.23 |
| Density | 0.928g/mLat 20°C(lit.) |
| Melting Point | n-(+)-dihydrarvone, ~77% |
| Boling Point | 87-88°C/6mmHg |
| Specific Rotation(α) | +17°(22℃,neat) |
| Flash Point | 102°C |
| JECFA Number | 377 |
| Solubility | Insoluble in water, soluble in ethanol |
| Appearance | Clear |
| Specific Gravity | 0.929 |
| Color | Clear |
| BRN | 2044615 |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | n20/D 1.471 |
| MDL | MFCD00001636 |
p-Menth-8-en-2-one,trans- - Risk and Safety
| Safety Description | S23 - Do not breathe vapour. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| HS Code | 29142900 |
p-Menth-8-en-2-one,trans- - Reference Information
| FEMA | 3565 | P-MENTH-8-EN-2-ONE |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | , may be added as edible and cosmetic flavors in confectionery, beverages, toothpaste and perfumes. Colorless to yellow liquid; Strong strong herb-like odor, spearmint flavor; Boiling point 1-220 ℃; Density L-D4150.929; Refractive index L-nD201.47348; optical rotation L-[α]D-15.6 ° (combined product [α]D20-18 ~-19 °); Insoluble in water, soluble in ethanol.|
| 150 | a method for synthesizing dihydrocarvone with epoxy limonene, comprising the following steps: Step 1, 500g of epoxy limonene was added to a 140 mL reaction kettle, 3g of ZnBr2 was added under stirring, and then the temperature was raised to 145-° C. To react for about 3 hours. After completion of the reaction, GC showed that 30g of white oil was added to the reaction solution, followed by distillation under reduced pressure to obtain 97.5% G of dihydrocarvone, the content of which was analyzed by GC and the yield of the product was 67%. In step 2, 50g of the kettle liquid (containing white oil) obtained by the above rectification is added into a 500 mL reactor, then 140g of epoxy limonene is added, and the reaction is carried out at 145 ~ ℃ for about 4 hours, after the end of the GC analysis reaction, vacuum distillation was carried out to obtain 195g of dihydrocarvone finished product, the GC analysis content was 97%, and the product yield was 65%. The second step was repeated twice, and the reaction time was correspondingly prolonged by about one hour. The average content was 97%, and the yield was 64.5%. The steps were repeated two more times, and the reaction time was correspondingly prolonged by about one hour at each repetition. As a result, the average content was 97%, and the yield was 63.5%. The catalytic efficiency was not significantly reduced. |
Last Update：2024-04-09 02:00:13
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View History
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