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EC number: 950-156-7
CAS number: -
The partition coefficient of
1,3-bis[12-hydroxy-octadecamide-N-methylene]-benzene is assessed in a
guideline study according to EU Method A.8. The partition coefficient of
the test material is not determinable due to its very low solubility
below detection limit in both n-octanol and water.
The partition coefficient of 12-hydroxyoctadecanoic acid, reaction
products with 1,3-benzenedimethanamine and hexamethylenediamine is
assessed in a guideline study according to EU Method A.8 using the HPLC
method. The log Pow of the substance is 6.01 at 20 °C.
The substance consists of multiple different constituents with
similar chemical structure:
are no experimental data on the multi-constituent substance available.
The individual constituents and mixtures of structurally similar
bisamides are considered suitable read-across substances. Experimental
results are provided from guideline studies on the following read-across
substances. For 1,3-bis[12-hydroxy-octadecamide-N-methylene]-benzene,
the partition coefficient could not be determined due to low solubility
of the substance in both water and n-octanol. For 12-hydroxyoctadecanoic
acid, reaction products with 1,3-benzenedimethanamine and
hexamethylenediamine, the determined log Kow is 6.01 (20 °C).
Predictions of the partition coefficient of three individual
constituents of the substance by the QSAR software tool EPI Suite v4.1.1
(KowWin v1.68) also resulted in very high low Kow values in the range of
11.31 – 13.08. Comparable Kow values were calculated for the three
individual constituents using the QSAR software tool ChemProp 6.7 (log
Kow > 9.71).
Since all constituents are structurally similar to each other, the
solubility in water and n-octanol of the substance being registered is
expected to be comparable to the properties of the read-across
substances. Based on the experimental data on the read-across substance
12-hydroxyoctadecanoic acid, reaction products with
1,3-benzenedimethanamine and hexamethylenediamine and the predicted
values by QSAR, a high partition coefficient is expected, which may not
be determinable due to low solubility. Conclusively, further testing is
not considered necessary.
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