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No experimental studies are available investigating the abiotic degradation of Silicic acid (H4SiO4), tetraethyl ester, reaction products with bis(acetyloxy)dioctylstannane (CAS 93925-43-0). The hydrolytic half-life in water could not be determined due to methodological limitations. It was not possible to establish a suitable analytical method in order to measure the concentration of the parent substance and to determine the hydrolysis products. However, fast hydrolysis is assumed based on the chemical structure of the substance.