... soluble in water and ethanol. 1,4-Butynediol[1]IUPAC name[hide]But-2-yne-1,4-diolOther names[hide]Butynediol2-Butyne-1,4-diol1,4-Dihydroxy ... Melting point52-55 °CBoiling point238 °CHazardsNFPA 704 1,4-Butynediol can be produced in the Reppe synthesis, where formaldehyde and acetylene ... bar.[2][edit] Applications1,4-Butynediol is a precursor to 1,4-butanediol. It is also used in the manufacture of plant ...