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Partition coefficient

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Description of key information

The Log Kow  of the substance is -1,05 at 25°C.

Key value for chemical safety assessment

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

Additional information

 Concerning the log Kow of trimethylenediamine (CAS 109-76-2), there are experimental data from an OECD 107 (shake flask method) guideline study available. The log Kow was determined to be -1.05 at 25 °C; the study was conducted without adjustment of the pH (BASF AG, 1989; report no.: BRU 89.037).

This result is supported by additional data from a non-guideline study, determining for trimethylenediamine a log Kow of -1.43 (temperature

not specified; Hansch et al, 1995; cited in LOGKOW database, 2010).

In addition, the result is supported by a calculated log Kow of -1.13 at 25 °C (KOWWIN v1.68, implemented in EPISuite v4.11; BASF SE, 2014).This estimate refers to the uncharged molecule.