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EC number: 948-052-1
CAS number: -
As the test item had a high affinity for the
stationary phase of the column, the mobile phase was adjusted to 100%
methanol after the retention time of DDT to elute the sample. The test
item was considered to contain no modes of dissociation. Therefore, the
test was performed at approximately neutral pH, with the test item in a
non-ionised form. As the slope of the calibration curve for the
reference standards showed good first order correlation and as the
retention times between duplicate injections for each solution was
consistent, the HPLC method was considered valid for the determination
of adsorption coefficient. Based on the chromatographic data, the test
item was considered to be stable during the test procedure.
The Adsorption coefficient of the test
substance was determined using a HPLC screening method, designed to be
compatible with the following methods:
1) Method 121 of the OECD Guidelines
for Testing of Chemicals, 22 January 2001
2) Method C.19 Adsorption Coefficient
of Commission Regulation (EC) No 440/2008 of 30 May 2008
The test system utilised high
performance liquid chromatography. A commercially available cyanopropyl
reverse phase HPLC column containing lipophilic and polar moieties was
The adsorption coefficient of the test
item has been determined to be in the range < 17.8 to > 4.27 x 105,
log10 Koc in the range < 1.25 to > 5.63. Based on the area percent
values, the majority of test item constituents will have a mobility
classification of immobile (>98% of the test item, log Koc >3.7, Koc
Adsorption coefficient of the test substance.
The adsorption coefficient of the test item
has been determined to be in the range < 17.8 to > 4.27 x 105, log10 Koc
in the range < 1.25 to > 5.63. Based on the area percent values, the
majority of test item constituents will have a mobility classification
of immobile (>98% of the test item, log Koc >3.7, Koc >5000).
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.
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