Registration Dossier
Registration Dossier
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EC number: 241-734-3 | CAS number: 17741-63-8
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The test substance is with high probability not acutely harmful to aquatic algae.
Key value for chemical safety assessment
Additional information
A Growth inhibition study according to OECD 201 and GLP has been conducted using Pseudokirchneriella subcapitata (BASF SE 2015). Due to the low solubility of the test item saturated solutions for every test concentration have been prepared seperately. However, concentration control analysis was not performed since the analytical detection limit was above the water solubility of the test substance. Nevertheless, all reasonable efforts were taken to produce a saturated solution of the test substance in test media, following the guidance in OECD 23. According to OECD 23, for tests with chemicals that can not be quantified by analytical methods at the concentrations causing effects, the effect concentration can be expressed based on the nominal concentrations. The dissolved concentrations of the test substance were below analytical detection limits (<10 μg/L) and could not be confirmed.
After 72 h of exposure an ErC50 of 109 mg/L and an ErC10 of 85.2 mg/L has been determined. Therefore, the test substance is with high probability not acutely harmful to aquatic algae.
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