Propargyl Alchohol

Cas Number


Other Names


The formula



Propargyl alcohol, or 2-propyn-1-ol, is an organic compound. It is the simplest stable alcohol containing an alkyne functional group. Propargyl alcohol is a colorless viscous liquid that is miscible with water and most polar organic solvents.

Physical and Chemical Properties
Chemical formula C3H4O
Molar mass 56.06 g·mol−1
Appearance Colorless to straw-colored liquid[1]
Odor geranium-like[1]
Density 0.9715 g/cm3
Melting point −51 to −48 °C (−60 to −54 °F; 222 to 225 K)
Boiling point 114 to 115 °C (237 to 239 °F; 387 to 388 K)
Solubility in water miscible[1]

It is used as a corrosion inhibitor, a metal complex solution, a solvent stabilizer and an electroplating brightener additive. It is also used as an intermediate in organic synthesis. Secondary and tertiary substituted propargylic alcohols undergo catalyzed rearrangement reactions to form α,β-unsaturated carbonyl compounds via the Meyer–Schuster rearrangement and others. It can be oxidized to propynal or propargylic acid.