Registration Dossier
Registration Dossier
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EC number: 402-580-4 | CAS number: 111439-76-0 ALKYLSILANE TZ 01748; DYNASYLAN 9405; EURENOR(R) 5020; PSX 5305
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Key value determined using OECD Guideline 201. Under the conditions of the present study with Pseudokirchneriella subcapitata, no reduction of growth rate or inhibition of yield was recorded at any of the concentrations of isobutylisopropyldimethoxysilane tested.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 1.4 mg/L
- EC10 or NOEC for freshwater algae:
- 1.4 mg/L
Additional information
Under the conditions of the present study with Pseudokirchneriella subcapitata, no reduction of growth rate or inhibition of yield was recorded at any of the concentrations of isobutylisopropyldimethoxysilane tested.
The EC50 for growth rate reduction (72h-ERC50) and yield inhibition (72h-EYC50) was beyond the range tested, i.e. exceeded an average concentration of 1.4 mg/l.
Due to the very low solubility of isobutylisopropyldimethoxysilane in water, concentration levels that might be toxic for algae could not be reached.
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