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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Phototransformation in air

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
phototransformation in air
Data waiving:
other justification
Justification for data waiving:
other:

Description of key information

Dipotassium oxide/ Potassium oxide has low vapor pressure (3.03E-014 Pa) indicating significant amounts of Dipotassium oxide/ Potassium oxide are unlikely to be present in the atmosphere for photodegradation. 
If released to air, a vapor pressure of 2.27E-016 mm Hg at 25 deg C (2.27E-016 mm Hg is equivalent to a vapour pressure of 3.03E-014 Pa) indicates significant amounts of Dipotassium oxide/ Potassium oxide are unlikely to be present in the atmosphere for photodegradation and therefore Dipotassium oxide/ Potassium oxide is not expected to be susceptible to direct photolysis by sunlight.

Key value for chemical safety assessment

Additional information

Dipotassium oxide/ Potassium oxide has low vapor pressure (3.03E-014 Pa) indicating significant amounts of Dipotassium oxide/ Potassium oxide are unlikely to be present in the atmosphere for photodegradation.

 

If released to air, a vapor pressure of 2.27E-016 mm Hg  at 25 deg C (2.27E-016 mm Hg is equivalent to a vapour pressure of 3.03E-014 Pa) indicates significant amounts of Dipotassium oxide/ Potassium oxide are unlikely to be present in the atmosphere for photodegradation and therefore Dipotassium oxide/ Potassium oxide is not expected to be susceptible to direct photolysis by sunlight.