DIETHYL BUTYNEDIOATE
Diethyl acetylenedicarboxylate
CAS: 762-21-0
Molecular Formula: C8H10O4
DIETHYL BUTYNEDIOATE - Names and Identifiers
| Name | Diethyl acetylenedicarboxylate |
| Synonyms | YL2-BUTYNEDIOATE DIETHYL BUTYNEDIOATE Diethyl 2-butynedioate diethyl but-2-ynedioate Diethyl but-2-yne-1,4-dioate Bis-(Ethoxycarbonyl)acetylene DIETHYL ACETYLENEDICARBOXYLATE butynedioic acid diethyl ester Diethyl acetylenedicarboxylate 2-butynedioic acid diethyl ester |
| CAS | 762-21-0 |
| EINECS | 212-095-8 |
| InChI | InChI=1/C8H10O4/c1-3-11-7(9)5-6-8(10)12-4-2/h3-4H2,1-2H3 |
DIETHYL BUTYNEDIOATE - Physico-chemical Properties
| Molecular Formula | C8H10O4 |
| Molar Mass | 170.16 |
| Density | 1.063g/mLat 25°C(lit.) |
| Melting Point | 1-3 °C |
| Boling Point | 107-110°C11mm Hg(lit.) |
| Flash Point | 202°F |
| Water Solubility | Soluble in ethanol, ethyl ether, CCl4, Insoluble in water. |
| Vapor Presure | 0.0546mmHg at 25°C |
| Appearance | Liquid |
| Specific Gravity | 1.063 |
| Color | Clear light yellow |
| BRN | 743166 |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.443(lit.) |
DIETHYL BUTYNEDIOATE - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | 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. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S25 - Avoid contact with eyes. |
| UN IDs | UN 3265 8/PG 2 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 8-10 |
| HS Code | 29171990 |
| Hazard Class | 8 |
| Packing Group | III |
DIETHYL BUTYNEDIOATE - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| Application | diethyl butyneate is a carboxylic acid ester organic substance, which can be used as an organic intermediate. |
| preparation | acetylene dicarboxylic acid (25.00g, 0.22 mol, 1 eq) dissolve in a mixture of 150 ethanol and 150 mL benzene. P-toluenesulfonic acid monohydrate (4.17g, 0.02 mol, 0.1 eq) was added to the reaction mixture. Reflux the solution using a Dean-Stark trap for 16 hours until water was quantitatively recovered (-7.9 mL). The reaction mixture was cooled to room temperature. The solvent was removed in vacuo. The oily residue was vacuum distilled (p = 0.5 mbar,T = 70 ° C.) to obtain the product. |
Last Update：2024-04-10 22:29:15
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