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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Estimated value with EPIWIN using the formula of the nickel free substance. The model KOWWIN included in the Estimation Program Interface (EPI) Suite v4.11 revealed a value of - 2.63 of the substance. The predicted value can be considered reliable yielding a useful result for further assessment.

Key value for chemical safety assessment

Log Kow (Log Pow):

Additional information

The substance is highly insoluble in water and is also not soluble in organic solvents, e.g. DMSO, DMF, n-Octanol, THF etc.. Therefore, according to REACH annex VII column 2, an experimental study can be waived but a calculated value should be provided. However, a calculated value for the Nickel complex cannot be estimated as the available tools, eg. EPIWIN are not useful: The relevant training set does not contain organometallic complexes and therefore estmated values are not valid. Nevertheless, using the formula of the complex not containing nickel (5,5'-azobis-2,4,6(1H,3H,5H)-pyrimidinetrione), a logKow of -2.63 is achieved.