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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Water solubility

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Administrative data

Link to relevant study record(s)

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Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
according to guideline
Guideline:
other: noguideline available (Handbook data)
Remarks on result:
not determinable
Remarks:
Na2O reacts violently with water. This produces sodium hydroxide.The interaction is likely to be violently exothermic with water.
Conclusions:
The substance is hydrolytically unstable and reacts violently with water producing sodium hydroxide.
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Qualifier:
according to guideline
Guideline:
other: No guideline available (Handbook data)
Remarks on result:
not determinable
Remarks:
Decomposes in water with violent reaction. Hygroscopic. Aqueous solution reacts strongly alkaline.
Conclusions:
The substance is hydrollytically unstable and reacts violently with water.

Description of key information

As the substance is hydrolytically unstable (reacts violently with water), the study cannot be conducted.


For the purpose of the risk assessment, the NaOH solubility is referenced as key value and the REACH dossier value is used (100g/100g H2O at 25°C).


 

Key value for chemical safety assessment

Water solubility:
1 000 g/L
at the temperature of:
25 °C

Additional information