Registration Dossier
Registration Dossier
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EC number: 931-216-1 | CAS number: 1335202-95-3
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
A study on the hydrolysis of oleic acid-based TEA-Esterquat is not needed, as the substance is readily biodegradable.
Half-life = greater than 1 year at a pH of 4 and 25 °C.
17 days at a pH of 7 and 25 °C.
11.3 days at a pH of 9 and 25 °C.
Key value for chemical safety assessment
Additional information
A
study on the hydrolysis of oleic acid-based TEA-Esterquat is not needed,
as the substance is readily biodegradable. TEA-Esterquats possess
ester links introduced into the head-group of the molecules, which have
the quality that they are susceptible to biodegradation as well as
hydrolysis.
Data on hydrolysis are however available for partially unsaturated TEA-Esterquat, which has an almost identical structure.
Hydrolysis as a function of pH was performed according to OECD Guideline 111 and EU-method C.7. (Preliminary test; main test not conducted due to the pronounced biodegradability of the test substance). At pH 4 and 50 °C, the degradation of the main component of partially unsaturated TEA-Esterquat was less than 10 % over a period of 120 h. The corresponding half-life at 25 °C is therefore assumed to be above one year (default assumption acc. to guidelines). In contrast, at pH 7 and 9 and 50 °C, more than 10 % of the test item was hydrolysed within 120 h. Based on the results half-lives of 17 (pH 7) and 11.3 d (pH 9) were deduced from the reaction rate constants at 25 °C. Di- and mono-ester were detected as degradation products.
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