Registration Dossier
Registration Dossier
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EC number: 402-810-3 | CAS number: 17980-47-1 DYNASILAN BH N; DYNASILAN BSM 100 N; DYNASILAN NH 42
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
(96-h) EC50: >3100 mg/L growth rate Desmodesmus subspicatus, reliability 2
NOEC: ≥100 mg/L growth rate Desmodesmus subspicatus, reliability 2
Key value for chemical safety assessment
Additional information
A 96-h EC50 value of >100 mg/l has been determined for the effects of the test substance on algal biomass and growth. A 96-h NOEC value of ≥100 mg/l has also been determined. The substance has a half-life of 22-h, the test media preparation involved a 24 h settling period and the study was conducted under a static regime. Therefore the organisms were exposed to predominantly to the hydrolysis product. This study has been chosen as key becasue it is a more recent study and greater care has been taken in the test media preparation.
A supporting study has determined 72-hour EC50 value of >36 mg/L and NOEC of ≥36 mg/L with Desmodesmus subspicatus (tested as Scenedesmus subspicatus).
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