2-Butynoic acid
ALDRICH/303666 - 98%
Synonym: Tetrolic acid
CAS Number: 590-93-2
Empirical Formula (Hill Notation): C4H4O2
Molecular Weight: 84.07
EC Number: 209-695-7
MDL Number: MFCD00004363
Linear Formula: CH3C≡CCO2H
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 303666-1G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 303666-5G
| assay | 98% |
| form | solid |
| InChI | 1S/C4H4O2/c1-2-3-4(5)6/h1 |
| InChI key | LUEHNHVFDCZTGL-UHFFFAOYSA |
| mp | 78-80 °C (lit.) |
| SMILES string | CC#CC(O)=O |
| Application: | 2-Butynoic acid was employed as synthon in a variety of reactions, including cycloacylation of phenols to flavones and chromones, and cyclization to γ-butyrolactones. It was also used in synthesis of Z-trisubstituted olefins via γ-alkylation. |
| General description: | The rotational spectrum of 2-butynoic acid was measured by pulsed supersonic-jet Fourier transform microwave spectroscopy. |
| Packaging: | 1, 5 g in glass bottle |
| Symbol |  GHS05 |
| Signal word | Danger |
| Hazard statements | H314 |
| Precautionary statements | P280 - P305 + P351 + P338 - P310 |
| Hazard Codes | C |
| Risk Statements | 34 |
| Safety Statements | 26-27-36/37/39-45 |
| RIDADR | UN 3261 8 / PGII |
| WGK Germany | WGK 3 |
| Purity | 98% |
| mp | 78-80 °C (lit.) |
| UNSPSC | 12352100 |