Registration Dossier
Registration Dossier
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EC number: 916-226-6 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The test item showed 80 % of respiration inhinbition of activated sludge at 18 mg/L test concentration. An EC10 of 4.94 mg/L and an EC50 of 12.1 mg/L were obtained in this test. The effect value relates to nominal concentration, since no analytical monitoring was performed.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 12.1 mg/L
Additional information
In order to test the toxicity to microorganism of the substance, activated sludge from predominantly domestic sewage plant was exposed to the test solution of five nominal concentrations of the substance (10, 18, 32, 56 and 100 mg/L), blank control solution and solution with positive reference substance for a period of 3 hours. Dissolved oxygen was recorded and respiration rates were calculated. A respiration inhibition of 33.3 % at 10 mg/L , 77.8 % at 18 mg/L, 94.4 % at 32 mg/L, and 98.6 % at 56 mg/L and 100 mg/L was observed. The toxicity study is classified as acceptable and satisfies the guideline requirements for the toxicity study to microorganisms.
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