Registration Dossier
Registration Dossier
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EC number: 479-940-2 | CAS number: 613246-75-6
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
Reference
Description of key information
The performance of the adsorption/desorption screening test with the Sika Härter LJ is technically not feasible because of tits rapid hydrolisation. An evaluation of the adsorption potential of its hydrolysis products is scientifically unjustified in accordance with REACH Annex VIII, section 9.3.1, column 2.
Key value for chemical safety assessment
Additional information
Non-submission justification:
In accordane with REACH Annex VIII, section 9.3.1 a study on adsorption/desorption has to be performed. However, the performance of the adsorption/desorption screening test is technically not feasible and scientifically unjustified.
Upon contact with water, the substance rapidly degrades within seconds. The hydrolysis depending from the pH was measured by using flow injection analysis mass spectrometry (FIA-MS) (please refer to IUCLID section 5.1.2). It was demonstrated that the substance rapidly, i.e. within seconds to minutes, hydrolytically degrades to Polyetheramin D230 (CAS No. 9046-10-0) and 2,2-Dimethyl-3-lauroyloxy-propanal (CAS No. 102985-93-3). A study on adsorption/desorption of the registered substance is thus technically not feasible. Therefore, in accordance with REACH Annex XI, this endpoint was waived.
Both hydrolysis products are of no concern for adsorption/desorpion. The log Pow of the hydrolysis product Polyetheramin D230 is very low (log Pow = 1.34 at 25 °C, please refer to the dissiminated ECHA REACH dossier for CAS 9046-10-0) and clearly below the trigger value of 3 for adsorption potential as indicated in the ECHA Guidance on Information Requirements and Safety Assessment, Chapter 7.a, Endpoint Specific Guidance (version 6.0, July 2017; currently being updated). Thus, in accordance with REACH Annex VIII column 2 no potential for adsportion/desorption is expected for the hydrolysis product Polyetheramin D230 (CAS No. 9046-10-0).
The other hydrolysis product, 2,2-Dimethyl-3-lauroyloxy-propanal, has been proven to be readily biodegradable and rapidly degraded by hydrolysis (please refer to section 5.1.2 and 5.2.1 as well as the the dissiminated ECHA REACH dossier for CAS 102985-93-3). Thus, in accordance with REACH Annex VIII colum 2 the hydrolysis product 2,2-Dimethyl-3-lauroyloxy-propanal (CAS No. 102985-93-3) does not need to be tested for adsorption/desporption.
In conclusion, further testing on the adsorption potential of the registered substance as well as of its hydrolysis products is not justified in accordance with REACH Annex XI, section 2 (study with parent compound technically not feasible) and REACH Annex VIII, section 9.3.1, column 2 (study on adsorption/desorption of hydrolysis products scientifically not necessary).
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.
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