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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Description of key information

Inorganic oxides in which the inorganic element is in its highest possible oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable (Endpoint Specific Guidance Chapter R.7A, p. 123). 

Key value for chemical safety assessment

Additional information

Removing electrons from NaOH is not obvious and no information is found what stable molecule could be produced. The sodium and hydroxide ions are quite stable in solution.

Justification for classification or non-classification