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: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
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.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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