2-Methylenebutanal
2-Methylenebutanal
CAS: 922-63-4
Molecular Formula: C5H8O
2-Methylenebutanal - Names and Identifiers
| Name | 2-Methylenebutanal |
| Synonyms | ethacrolein Ethylacrolein α-Ethylacrolein 2-Ethylacrolein 2-Methylenebutanal 2-Ethylacrylaldehyde 2-methylidenebutanal 2-Ethylpropenal, 2-Methylenebutyraldehyde |
| CAS | 922-63-4 |
| EINECS | 213-079-3 |
| InChI | InChI=1/C5H8O/c1-3-5(2)4-6/h4H,2-3H2,1H3 |
2-Methylenebutanal - Physico-chemical Properties
| Molecular Formula | C5H8O |
| Molar Mass | 84.12 |
| Density | 0.859 g/mL at 25 °C(lit.) |
| Melting Point | -101.15°C (estimate) |
| Boling Point | 92-93°C |
| Flash Point | 1°C |
| Water Solubility | Soluble in alcohol. Insoluble in water. |
| Vapor Presure | 51.5mmHg at 25°C |
| Exposure Limit | ACGIH: TWA 1 mg/m3OSHA: TWA 2 mg/m3NIOSH: IDLH 50 mg/m3; Ceiling 2 mg/m3 |
| BRN | 1098378 |
| Storage Condition | 2-8°C |
| Sensitive | Air Sensitive |
| Refractive Index | 1.425 |
| MDL | MFCD00010129 |
| Physical and Chemical Properties | This product is colorless liquid, B. p.92 ~ 93 ℃,n20D 1.4271, relative density 0.859,f.p.1 ℃, insoluble in water, miscible with ethanol and acetone. |
2-Methylenebutanal - Risk and Safety
| Risk Codes | R11 - Highly Flammable R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S28 - After contact with skin, wash immediately with plenty of soap-suds. |
| UN IDs | 1992 |
| WGK Germany | 3 |
| RTECS | ES3480000 |
| Hazard Class | 3 |
| Packing Group | II |
2-Methylenebutanal - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | 2-ethylacrolein is an intermediate of the herbicide imidazolidinic acid. |
| production method | the preparation method is to add formaldehyde and N-butyraldehyde in a reaction kettle and react in the presence of dehydration catalyst di-n-butylamine, the temperature was raised and refluxed for 1 h, the mixture was cooled and layered, and the organic layer was washed with water to obtain a finished product. |
Last Update：2024-04-09 15:16:53
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