| Boiling Point | 128.9°C |
| Melting Point | −63.6°C |
| Density | 0.926 g/mL at 25°C (lit.) |
| Color | Yellow |
| Linear Formula | HC≡CCH2CH2OH |
| Formula Weight | 70.09 |
| percent purity | ≥97.0% (GC) |
| Physical Form | Liquid |
| Chemical Name or Material | 3-Butyn-1-ol |
| UN Number | 1987 |
| Molecular Weight | 70.09 g/mol |
| Refractive Index | n20/D 1.441 (lit.) |
| Assay | 97% |
| CAS Number | 927-74-2 |
| EC Number | 213-161-9 |
| NACRES | NA.22 |
| PubChem Substance ID | 24847980 |
| UNSPSC Code | 12352100 |
| MDL Number | MFCD00002955 |
| Beilstein/REAXYS Number | 773710 |
| Applications | Pharmaceutical intermediate manufacturing (terminal-alkyne building block for click chemistry, cross-coupling, and heterocycle synthesis) |
This compound combines a terminal alkyne with a primary alcohol two carbons away, giving it two distinct reactive handles — the alkyne for coupling/cycloaddition chemistry and the alcohol for esterification or further functionalization.
This compound is used as a building block in pharmaceutical manufacturing, serving as a synthon for oxygen-containing heterocycles and protected amino-acid ester intermediates, and as a terminal-alkyne partner in palladium-catalyzed coupling reactions.
