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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

No data are available on the toxicity of the registered substance to aquatic micro-organisms. However, for the read-across substance Reaction mass of monomer, dimer, trimer and oligomer potassium methylsilanetriolate (EC 250-807-9) toxicity to microorganisms was determined: 
ASRI 3 hr EC50 >100mg/l (loading rate) (OECD 209)

Key value for chemical safety assessment

Additional information

No data are available on the toxicity of the registered substance to aquatic micro-organisms. However, data are available for the read-across substance potassium methylsilanetriolate which is a multi-constituent substance containing methylsilanetriolate, dimers and oligomers of methylsilanetriolate, and potassium hydroxide at high pH in aqueous solution (EC number 250-807-9). In contact with water reaction mass of potassium methylsiliconate is dissolving. The resulting aqueous solution is very similar to the read-across substance potassium methylsilanetriolate. Both aqueous solutions are only stable at high pH. As the pH is lowered, polymerisation occurs. Therefore it is considered appropriate to read across the available date on potassium methylsilanetriolate.The read-across data indicates that the test substance is not toxic to waste water (activated sludge) bacteria at a loading rate of 100 mg/l.