Registration Dossier
Registration Dossier
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EC number: 308-415-1 | CAS number: 97953-16-7
Endpoint summary
Administrative data
Description of key information
A reliable Klimisch 1 (OECD Guideline, to GLP standards) study assessed hydrolysis of the read across substance, Imidazolium compounds, 2-C17-unsatd.-alkyl-1-(2-C18-unsatd. amidoethyl)-4,5-dihydro-N-methyl, Me sulfates (CAS number 931 -745 -8), based on the C18:1/C18:1 imidazolinium quat constituent.
Hydrolysis of the test item at 1 mg a.i./L was studied in the dark at 20 ºC, 50 ºC and 60 ºC in sterile aqueous buffered solutions at pH 4 (acetate buffer), pH 7 (phosphate buffer) and pH 9 (borate buffer) for 5 days. Samples were analysed by HPLC-Tandem Mass spectrometry, using a validated analytical method. For this constituent the study reported a solubility limit of 2.2 mg/L and therefore the test was run below the limit of solubility.
The half-life (lives)/DT50 (50% decline times) of the test item were:
at pH 4: > 1 year at 25°C
at pH 7: 2.9 days at 20°C, 2.5 days at 25°C, 27 hours at 50°C and 16 hours at 60°C
A supporting study is also presented for the read across substance, Fatty acids, C16-18 (even numbered) and C18 unsatd., reaction products with diethylene triamine, di-Me sulfate quaternized (CAS number 937 -237 -2). The hydrolysis of this substance was not able to be assessed due to the substance being insoluble.
Additional information
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