Physical and chemical properties of 1, 4-butanediol (BDO) Density 1.0± 0.1g /cm3 Boiling point 228.0±0.0 °C at 760 mmHg Melting point 20 °C Molecular formula C4H10O2 Molecular weight 90.121 Flash point 105.9±13.0 °C Exact mass 90.068077 PSA 40.46000 LogP-1.02 Colorless liquid with viscous appearance