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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Partition coefficient

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Administrative data

Link to relevant study record(s)

Description of key information

Log Kow = 0.4 (unionised form, at pH >= 13)
Log D=-3.75 at pH=7.5 (ERA)
Low potential for bioaccumulation.

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
25 °C

Additional information

An experimental study was provided, however it was considered as not reliable since it was conducted at pH below the pKa, where the substance is not unionised.

Therefore a weight-of evidence was based on the SPARC model, able to calculate the log D (distribution coefficient) as a function of pH, and a robust publication on Log Pow calculation (QSAR).

For the unionised form, as log Kow is defined, the retained value will be the mean of the two results.

As the unionised form is not relevant at environmental pH range, for the risk assessment, the SPARC estimated value will be retained for pH=7.5, as this is the most expected pH value after STP treatment.

This information is considered to be sufficient for classification and risk assessment purpose.