Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Stability: thermal, sunlight, metals

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Administrative data

Link to relevant study record(s)

Description of key information

Gaseous ethylene oxide may decompose violently when coming in contact with an ignition source.

Additional information

Gaseous ethylene oxide starts to decompose at ca. 400 °C to form mainly CO, CH4, as well as C2H6, C2H4, H2, C, and

CH3CHO. The first step in the decomposition is presumed to be the isomerization of ethylene oxide to acetaldehyde [30]. Once the decomposition reaction has been initiated (ignition source), it can be propagated through the gas phase and, under certain conditions, may be explosive.

Justification for classification or non-classification