Registration Dossier
Registration Dossier
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EC number: 233-215-5 | CAS number: 10081-67-1
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Key value determined using OECD no. 209, EU Method C11 and ISO Standard 8192
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
- EC10 or NOEC for microorganisms:
- 1 000 mg/L
Additional information
The test substance was not completely soluble in test medium at the loading rates initially prepared. Therefore, the test substance – Milli-RO water mixtures were magnetically stirred for a period of approximately 25 hours. Subsequently, synthetic medium, sludge and Milli-RO water were added resulting in the required loading rates. Optimal contact between the test substance and test medium was ensured applying continuous aeration and stirring during the 3-hour exposure period.
4-(1-methyl-1-phenylethyl)-N-[4-(1-methyl-1-phenylethyl)phenyl]aniline was not toxic to waste water (activated sludge) bacteria at or below a loading rate of 1000 mg/l (NOEC).
The EC50 exceeded a loading rate of 1000 mg/l.
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