Registration Dossier
Registration Dossier
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EC number: 268-610-1 | CAS number: 68131-13-5
Endpoint summary
Administrative data
Description of key information
Additional information
SOLID-WATER PARTITIONING (ADSORPTION / DESORPTION)
The registration substance is a cationic surfactant and classical estimation methods for the Koc from Log Kow are not applicable. C20/22 ATQ, CAS No. 68607-24-9 which already registered under REACH is a cationic surfactant as well (positively charged nitrogen). The results from an OECD 106 Adsorption/Desorption study with [14C]-C22 ATQ is used for the registration substance as it has turned out that they describe well the ionic interaction in sorption to solids for other cationics as well. This read across can be seen as a worst case.In the table below the result of the C20/22 ATQ OECD 106 study are given as well as their translation into values which are nomalized for the use in the Exposure Modelling Program EUSES.
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OECD106 results at 10 µg/L |
EUSES STANDARD VALUES %OC and Kd related to Koc |
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SOIL |
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|
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|
% OC |
Koc (L/kg) average |
% OC |
Kd (L/kg) EUSES |
EUSES Term for |
Cranfield 164 |
3.7 |
52486 |
|
|
|
Cranfield 277 |
2.7 |
543315 |
|
|
|
Cranfield 299 |
2.9 |
309138 |
|
|
|
mean |
3.1 |
226807 |
2 |
4536 |
SOIL |
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|
|
|
|
|
SEDIMENT |
|
|
|
|
|
SW |
11.1 |
29258 |
5 |
1463 |
SEDIMENT |
|
|
|
|
|
|
SLUDGE |
|
|
|
|
|
secondary (activated) |
39.9 |
731 |
37 |
270 |
ACTIV. SLUDGE |
AIR-WATER PARTITIONING (HENRY's LAW CONSTANT)
The Exposure Modelling Program EUSES calculates for the air-water partitioning
Henry's Law Constant (HLC) 5*E-04 Pa*m3/mol at 12 deg Celsius
Air-water partitioning coefficient: 2.1*E-07 m3/m3
DISTRIBUTION MODELLING
For the registration substance an Envrionmental exposure and Risk Assessment was carried out with EUSES 2.1 The complete EUSES Assessment report which includes the Distribution modelling is attached in Chapter 13 of the IUCLID,
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.
