1,3-Dioxane Other names: m-Dioxane m-Dioxin, dihydro- 1,3-Dioxacyclohexane 1,3-Propanediol formal Formula: C4H8O2 CAS: 505-22-6 Weight: 88,1051 g/mol Boiling point: 105 – 106 °C Melting point: -45 °C Density: 1,032 g/cm3