Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 931-292-6
CAS number: 308062-28-4
The adsorption of C12-14 amine oxide in three soil types was determined
according to OECD TG 106. Kom values were obtained for C12 and C14
homologues, converted to Koc and these values were used to calculate Kd
values normalised to 2 % organic carbon. The geometric mean of the Kd
values was used to calculate the Koc for C12-14 amine oxide of 1525 L/kg.
The adsorption of
C12-14 amine oxide in three soil types was determined in a GLP study
according to OECD TG 106 [Van de Ruit (2002)]. The
soil types used were obtained from various locations in the Netherlands.
Organic matter/clay contents of the three soils (labelled 545070, 543151
and 545347) were 2.7 %/3.2 %, 0.8 %/11 % and 2.6 %/24 % respectively. Two
homologues (C12 and C14) of the test material were evaluated for
adsorption in the study (desorption was not tested). The applied
soil:solution ratio was 1:5. For all three soil types, adsorption
equilibrium was reached at 7 h of incubation. Adsorption percentages
were in the range of 68 - 100% after this time.
recovery of the duplicate soilless control
solutions was 109 and 110 % for the C12-homologue and 109% (2x) for the
C14 homologue at equilibrium (7 hrs), indicating no adsorption onto the
container occurred. No matrix effect of the soil onto analytical results
was observed for the measurement of test material in aqueous phase after
equilibration of 0.01 M CaCI2 solution in Suprapur® water with soil
number 545347. Results of the blanks were therefore not taken into
account when calculating the results for the test substance. The
influence of soil on the pH of the aqueous phase was in the range of
approximately 0.2 to 1.3 pH unit.
The mean adsorption
coefficient (Kd) for soil 5545070, soil 543151, and soil 545347 was 8.3,
>16.9 (56.1), and >16.1 (18.3) L/kg, respectively for the C12 homologue
and >16.8 (24.5), >15.8 (17.2) and >16.8 (33.3) for the C14 homologue.
The mean adsorption coefficient related to the soil organic matter
(Kom), for soil 5545070, soil 543151, and soil 545347 was 307, >2113
(7013), and >619 (702) L/Kg, respectively for the C12 homologue and >622
(906), >1969 (2151) and >646 (1281) for the C14 homologue.
In order to calculate
the Koc value for use in the exposure assessment, Kom values were
converted into Koc values using the relationship soil organic matter =
1.724 x soil organic carbon content. The
Kom value for the C12 homologue in soil 543151 was excluded from
calculations as a suspected outlier due to the low percentage organic
carbon of the soil type used, which may limit correlation with organic
carbon content, and since the data failed to correlate with the
increased affinity for soils anticipated to be demonstrated by the C14homologue.
The Koc values were then used to calculate the theoretical distribution
coefficient Kd normalised to 2% organic carbon. The geometric mean of
the Kd values was calculated as 46.8 L/kg, equivalent to a Koc of 1525
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again