Registration Dossier
Registration Dossier
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EC number: 940-123-5 | CAS number: 866889-74-9
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The log Koc of C16-18 DMAPA amidoamine was determined to be in the range of 7.8 to 8.0 (OECD guideline121/EU method C.19; HPLC method).
Key value for chemical safety assessment
- Koc at 20 °C:
- 63 100 000
Additional information
In a study conducted according to OECD Guideline 121 (adopted on January 22, 2001) and EU Method C.19 (30 May 2008) the soil sorption coefficient log Koc of C16-18 DMAPA amidoamine was determined to be in the range of 7.8 to 8.0. This value would indicate that the test substance will be adsorbed by organic carbon in soil. Based on the results, the test item can be regarded as immobile in soil. According to the statement in the guideline, however, the method may not work for surface-active substances and the results (test substance was not eluted from the column) confirm this statement.
The following study according to OECD guideline 106 with C22-Trimethylammonium Chloride is enclosed to justify the read-across approach for sediment and terrestrial toxicity studies:
C22-Trimethylammonium Chloride adsorption isotherms could be described by the Freundlich equation. KF oc ads values were 19.8 E03 L/kg (Cranfield 164 soil), 516 E03L/kg (Cranfield 277 soil), 52.8 E03 L/kg (Cranfield 299 soil), 17.4 E03 L/kg (SW sediment) and 0.95 E03 L/kg (Tilburg sludge).
[LogKoc: 7.8]
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