Ethyl alpha-acetylpropionate
Ethyl 2-methylacetoacetate
CAS: 609-14-3
Molecular Formula: C7H12O3
Ethyl alpha-acetylpropionate - Names and Identifiers
Ethyl alpha-acetylpropionate - Physico-chemical Properties
| Molecular Formula | C7H12O3 |
| Molar Mass | 144.17 |
| Density | 1.019 g/mL at 25 °C (lit.) |
| Melting Point | -45 °C |
| Boling Point | 187 °C (lit.) |
| Flash Point | 145°F |
| Water Solubility | IMMISCIBLE |
| Solubility | Chloroform (Slightly), Methanol (Slightly) |
| Vapor Presure | 0.686mmHg at 25°C |
| Appearance | Liquid |
| Specific Gravity | 1.019 |
| Color | Clear colorless to yellow |
| BRN | 1071742 |
| pKa | 11.98±0.46(Predicted) |
| Storage Condition | Inert atmosphere,Room Temperature |
| Refractive Index | n20/D 1.418(lit.) |
| Physical and Chemical Properties | Ethyl α-methylacetoacetate Pure is a colorless transparent liquid with an ester flavor, M.P. -45 ℃, B. p. 188 ℃,n20D 1.4182, relative density 1.0190, soluble in benzene, xylene, insoluble in water. |
Ethyl alpha-acetylpropionate - Risk and Safety
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| UN IDs | 1993 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29182300 |
Ethyl alpha-acetylpropionate - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | ethyl α-methyl acetoacetate is an intermediate for the preparation of the pesticide anti-aphidb. Used as an intermediate for medicine and pesticides |
| Production method | Ethyl α-methyl acetoacetate is prepared by the reaction of ethyl acetoacetate and dimethyl sulfate. In the glass-lined reaction kettle in advance add xylene, ethyl acetoacetate, dimethyl sulfate and phase transfer catalyst, stirring, slowly add sodium hydroxide solution, control the reaction temperature not to exceed 40 ℃, continue stirring for 1.5h after addition, control pH = 8~9, then rest for 1h, separate out the water layer, add water to wash until the aqueous solution is neutral, stand still, separate out the water layer (send three wastes treatment), and dehydrate the xylene solution under reduced pressure, concentrate until the content of methyl ethyl acetoacetate containing milk is 35% ~ 40% to stop concentration, obtain milk methyl ethyl acetoacetate xylene solution, and then dissolve to obtain the product. Ethyl α-methyl acetoacetate can also be prepared from ethyl acetoacetate, potassium carbonate and methyl iodide by solid-liquid alkylation under certain conditions. |
Last Update：2024-04-10 22:29:15
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