1,3 Dioxane

1,3-Dioxane or m-dioxane is a chemical compound with the molecular formula C₄H₈O₂, the CAS number 505-22-6 , EC Number 208-005-1 and RTECS JG8224000.

1,3-Dioxanes and 1,3-dioxolanes are prepared from carbonyl compounds with 1,3-propanediol or 1,2-ethanediol in the presence of Brönsted or Lewis acid catalysts.