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Environmental fate & pathways

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Photodegradation in air

No measured data on photodegradation/photolysis are available for TEA-Esterquats. Due to the very low emissions of TEA-Esterquats to air (negligible vapour pressure) the extent of photodegradation in air has no relevance for the environmental fate for this class of chemicals.



TEA-Esterquats are characterized by hydrophobic parts of the moieties “R” linked to the charged head group via ester bonds R-C(O)O-and are therefore expected to be subject to degradation by chemical or biological hydrolysis. This is supported by the test on hydrolysis for partially unsaturated TEA-Esterquat. 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.

According to REACH regulation (Annex VIII, column 2) a hydrolysis test does not need to be conducted if the substance is readily biodegradable. As the TEA-Esterquats are determined to be readily biodegradable, biodegradable under anaerobic conditions and under different environmental conditions (water, sewage treatment plants) a study on hydrolysis is considered to be not necessary.