Registration Dossier
Registration Dossier
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EC number: 295-714-4 | CAS number: 92128-22-8
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The adsorption coefficient (log Koc) of this substance is 8.2 -8.5 at pH 6.4 estimated by HPLC method according to OECD guideline 121.
Key value for chemical safety assessment
- Koc at 20 °C:
- 316 227 766
Additional information
Under environmentally relevant pH (5-9), in water solution Fatty acids, tall-oil, compds. with N-[3-(dimethylamino)propyl]tall-oil amides is expected to be dominated by deprotonated fatty acids and protonated Amides, tall-oil fatty, N-[3-(dimethylamino)propyl]. Therefore the adsorption coefficient must be experimentally determined and calculation methods are no more suitable. Keeping in mind the surface active property of the test substance and the UVCB nature, HPLC-method is considered as the most realistic estimation method to present a distribution as result, but potential underestimation is expected. According to the classification scheme of Swann et al. (1983) the estimated log Koc-values 8.2 -8.5 indicate a very strong sorption potential to soil and sediment and suggests a slow migration potential to ground water. The estimated value from HPLC-method is already so high that even higher values would not change the assessment based on log Koc; and hence no further testing is considered necessary.
[LogKoc: 8.5]
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