Registration Dossier
Registration Dossier
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EC number: 269-665-4 | CAS number: 68308-74-7
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The 3 -hour EC50 was determined to be >1000 mg/L and the 3 -hour NOEC was determined to be 1000 mg/L.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
- EC10 or NOEC for microorganisms:
- 1 000 mg/L
Additional information
A 3 -hour OECD 209 activated sludge respiration inhibition test was conducted for DMATO. Activated sludge collected from a wastewater treatment plant which handles predominantly domestic sewage was exposed to the test substance at concentrations of 0(control), 10, 100, and 1000 mg/L. The oxygen content was measured at the beginning of the test and after 3 hours exposure to the test item at 20 ± 2 °C.
The test substance was not found to cause significant inhibition to activated sludge respiration even at the highest concentration tested. As such, the 3 -hour EC50 was determined to be >1000 mg/L and the 3 -hour NOEC was determined to be 1000 mg/L.
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