Polyoxymethylene dimethyl ethers (PODE or DMMn) are a class of chemical compounds with the molecular formula H<sub>3</sub>CO(CH<sub>2</sub>O)<sub>n</sub>CH<sub>3</sub> where n is typically about 3 to 8.
PODE can be produced from methylal and formaldehyde or a formaldehyde equivalent such as paraformaldehyde or trioxane.
PODE is used as a diesel fuel additive and as a solvent.