Registration Dossier
Registration Dossier
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EC number: 403-830-5 | CAS number: 89331-94-2 B 290; BK 400; CK 34; DIBUTYL-N-102; DX-20; FAT NR. 40391/A; FLUORAN BLACK BD 869; FLUORAN SCHWARZ BD 869; NOIR FLUORANE BD 869; ODB-2; PSD-290; SENOR-2; TG-31; TH-108; WINCON-2
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Due to the low solubility of the test substance no end-point could be attained.
EbC50 > 0.76 mg / l
ErC50 > 0.76 mg / l
Key value for chemical safety assessment
Additional information
In a 72 hour acute toxicity (growth inhibition) test under static conditions, no abnormalities were found in any of the test or control cultures after 72 hours.
1.0 mg/1 was the highest test concentration that could be prepared due to the limited solubility of the test substance in water and having regard to the amount of auxiliary solvent permitted in the test. However, because of the unstable nature of the test substance in water under light conditions, the calculated mean measured value of 0.76 mg/1 over the study period has been quoted.
The toxicity study is classified as acceptable and fully satisfies the guideline requirement for algae. The data from this study clearly shows the test substance not to be acutely toxic at levels up to and exceeding the limit of solubility.
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