Registration Dossier
Registration Dossier
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nonapotassium 2,4,6-trihydroxy-4-methyl-3,5-dioxa-2,4,6-trisilaheptane-2,6-bis(olate) 2,6,8-trihydroxy-4,6-dimethyl-3,5,7-trioxa-2,4,6,8-tetrasilanonane-2,4,8-tris(olate) 6-hydroxy-2,4,6-trimethyl-1,3,5,2,4,6-trioxatrisilinane-2,4-bis(olate) dihydroxy(methyl)silanolate {[dihydroxy(methyl)silyl]oxy}(hydroxy)methylsilanolate
EC number: 935-877-7 | CAS number: -
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
No data are available on the short-term toxicity of the registered substance to aquatic invertebrates. A 48-h EC50 value of >100 mg/l and NOEC of 10 mg/L have however been determined for the effects of a read-across substance, Reaction mass of monomer, dimer, trimer and oligomer potassium methylsilanetriolate (EC 250-807-9) on mobility of Daphnia magna. The measured data is supported by predictions for the hydrolysis product methylsilanetriol (48-h LC50 value of 29600 mg/l).
Key value for chemical safety assessment
Additional information
No data are available on the short-term toxicity of the registered substance to aquatic invertebrates. 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 measured data is supported by predictions for the hydrolysis productmethylsilanetriol(48-h LC50 value of 29600 mg/l).
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