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EC number: 217-983-9
CAS number: 2031-67-6
(72-hour) EC50: >500 mg/l growth rate Pseudokirchnerella subcapitata
(72-hour) NOEC: ≥500 mg/l growth rate Pseudokirchnerella subcapitata
(72-hour) LC50: 2115 mg/l growth rate, algae, hydrolysis product (using an appropriate calculation method)
A 72-hour EC50 value of >500 mg/l and NOEC of ≥500 mg/l have been
determined for the effects of the test substance on growth rate of
Pseudokirchnerella subcapitata (tested as: Selenastrum capricornutum)
based on nominal concentration of the substance.
The study was conducted according to a standard guideline (EU
Method C.3, Algal Inhibition test) and GLP and so was selected as key
In support of this data, two other results of lower reliability,
from secondary sources, are available and report EC50 values of >1000
mg/l for S. capricornutum and Anabaena flos-aquae. As the substance
hydrolyses rapidly (half-life of approximately 5.5 hours), it is very
likely that the test organisms were primarily exposed to hydrolysis
product, methylsilanetriol. A 96-h LC50 of 2115 mg/l was derived for the
hydrolysis product using an appropriate calculation method (2011).
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