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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Data are available from a transformation dissolution test, conducted according to OECD guideline 29, and a water solubility study according to OECD guideline 105.  
Both study data are reliable without restrictions. Data set is supported by reliable data from a peer reviewed handbook (CRC Handbook).

Key value for chemical safety assessment

Water solubility:
3.774 µg/L
at the temperature of:
21.2 °C

Additional information

Selenium was reported to be insoluble in a peer reviewed handbook. OECD 105 study; the amount solved were below the limit of determination (21 µg/L).

Transformation dissolution test (dissolved Selenium concentrations):

Screening test after 24 hours at 20.9 °C:

3.120 µg/L at pH 8

2.645 µg/L at pH 6

Main test, sampling time 7 days, at pH 8 and 21.2 °C:

Loading 1 mg/L              1.011 µg/L

Loading 10 mg/L            1.502 µg/L

Loading 100 mg/L         3.774 µg/L

 

The value of 3.774 µg/L is chosen for chemical safety assessment, as a worst case assumption.