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1,4-Dioxane, also known as diethylene ether, diethylene dioxide or simply dioxane, as the 1,2 and 1,3 isomers are rarely encountered, is a heterocyclic organic compound, a cyclic ether.



Dioxane can be reacted with dry chlorine gas to yield trans-2,3-dichloro-1,4-dioxane.


Dioxane is a colorless liquid, with a faint sweet odor similar to that of diethyl ether. It is miscible with many solvents and is hygroscopic. Dioxane boils at 101.1 °C and freezes at 11.8 °C.


Dioxan can be bought from eBay.


Dioxane is produced by the acid-catalysed dehydration of ethylene glycol.

Frogfot wrote a synthesis of dioxane.


  • Stabilize trichloroethane
  • Medium for organic reactions



Dioxane is considered carcinogenic. It is also very flammable.

Dioxane is sometimes confused with dioxin.


Dioxane should be stored in closed bottles, with a reducing agent to prevent the formation of peroxides.


Dioxane can be safely burned, if there are no peroxides. If the dioxane tests positive for peroxides, neutralize peroxides first. Reducing agents, like as ferrous sulfate, sodium bisulfite or metabisulfite added in excess can be used to neutralize the peroxides. After incineration, the ether should be tested again for peroxides and if none are present, it can be safely burned. If it's an old bottle, which has peroxides on the cap, do not open the bottle, instead take it to a remote of special area and safely detonate it. The latter may or require professional help.


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