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EC number: 204-847-9
CAS number: 127-52-6
The octanol-water partition coefficient is based on an experimental value and supporting data base information: Log Pow: 0.14 ± 0.29.
A valid experimental study
provides a log Pow value of 0.14 ± 0.29, which was determined at pH 7
and 26°C. Since the study was conducted using a buffer to adjust the pH
value to 7, precipitation of the substance might have occurred leading
to lower concentrations of dissolved substance in water. Furthermore,
due to instability of the substance in octanol, analytical determination
of the substance in octanol was not possible. Hence, the concentration
in octanol was determined by calculating the difference between the
initial concentration (confirmed by analytical measurements) and the
measured concentration in water. Based on this, the above value is
interfered with uncertainty. Data base data however indicate a log Pow
of 0.29, given for CAS 127 -52 -6, the main constituent of "CAS 127 -52
-6 trihydrate". Furthermore, the KOWWIN v1.67 module of EPIWIN v3.12
provides a value of -1.05 for CAS 127 -52 -6. Both values support the
experimental data obtained for CAS 127 -52 -6 trihydrate, which hence
will be used.
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