Registration Dossier
Registration Dossier
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EC number: 479-940-2 | CAS number: 613246-75-6
Endpoint summary
Administrative data
Description of key information
Hydrolysis
In contact with water the Sika Härter LJ will hydrolyse rapidly.
Additional information
Hydrolysis
Sika Härter LJ belongs to a class of polyaldimine compounds used as hardeners for polyurethane moisture hardening preparations. Upon contact with water, the hardening process is initiated and the hardener rapidly degrades. The hydrolysis products are Polyetheramin D230 (CAS No. 9046-10-0) and 2,2-Dimethyl-3-lauroyloxy-propanal (CAS No. 102985-93-3). According to non-GLP data from the manufacturer hydrolysis of Sika Härter LJ is acid catalysed. In order to assess the hydrolysis time different hydrolysis measurements (short term and long term) with flow injection analysis mass spectrometry (FIA-MS) were tested. A direct injection of the test item diluted in water free methanol into the FIA-MS, exposed to acetous and bidest. water, was performed for the short term measurement. The long term measurement contained the exposure of the test item with bidest water, acetous water and slightly carbonated water and the periodical recording of the FIMS measures. The results are as follows:
a) hydrolysis with acetous water (1% acetic acid):< 2 sec
b) hydrolysis with bidest. water.>> 2 sec
c) hydrolysis with acetous water as a function of time:< 5 min
d) hydrolysis with bidest. water as a function of time:≥ 20 min
e) hydrolysis with slightly carbonated water as a function of time:< 20 min
Due to its use, Sika Härter LJ has a very limited stability in water as it needs to react rapidly upon contact with water.
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