butyne-1.4-diol CAS:110-65-6 Molecular formula: C4H6O2 Structural formula: HOH2CCâ?¡CCH2OH Molecular weight: 86.09 Appearance: White crystal Content: 98.0% min Aldehyde (methyl aldehyde): 0.5% max Melting point: 42-50 Packing: N.W: 50kg / fibre drum or iron drum