Dioxan Chemical formula
Synonyms: Diethylene Dioxide; Diethylene Ether; Dioksan; Dioxane; Dioxano. 1,4-Dioxane.
Cyrillic synonym: Диоксан.

💊 Chemical information

Chemical formula: C4H8O2 = 88.11.
CAS — 123-91-1.


Dioxan is a colourless flammable liquid with an ethereal odour. Wt per mL about 1.03 g. B.p. about 101°. Store in airtight containers.


It is dangerous to distil or evaporate dioxan unless precautions have been taken to remove explosive peroxides.

💊 Adverse Effects, Treatment, and Precautions

Dioxan vapour is irritant to mucous membranes. High concentrations may cause nausea and vomiting, and CNS depression with headache, dizziness, drowsiness, and in severe cases unconsciousness. On repeated exposure, severe hepatic and renal damage, including necrotic changes, can occur and may be fatal. Direct contact with liquid dioxan can result in dermatitis. Dioxan has been shown to be carcinogenic in animals. Treatment consists of removal from exposure and general supportive and symptomatic measures.


Suitable precautions should be taken to avoid skin contact with dioxan as it can penetrate skin and produce systemic toxicity.

💊 Pharmacokinetics

Dioxan is absorbed after inhalation and through the skin. It is metabolised by oxidation to
β-hydroxyethoxy-acetic acid.

💊 Uses

Dioxan is used as an industrial solvent.
Published October 31, 2018.