Registration Dossier
Registration Dossier
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EC number: 242-560-0 | CAS number: 18765-38-3
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
Bioaccumulation: aquatic/sediment: Low potential for bioaccumulation
Key value for chemical safety assessment
Additional information
Testing is waived as direct or indirect exposure of aquatic organisms to the registered substance is very limited due to the instability of the substance in water.
Tetrakis(2 -butoxyethyl) orthosilicate hydrolyses rapidly (t1/2= 4 h at pH 7 and 25°C). The hydrolysis products are monosilicic acid and 2 -butoxyethanol. 2 -Butoxyethanol is expected to biodegrade quickly. Monosilicic acid exists only in dilute aqueous solutions and readily condenses at concentrations above approximately 100 - 150 mg/l as SiO2 to give a dynamic equilibrium between monomer, oligomers and insoluble polysilicic acid. These are naturally-occurring inorganic substances and will enter the natural biogeochemical cycle for silicon ( PFA, 2015ao).
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