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EC number: 947-817-7 | CAS number: -
A study was conducted to determine the biodegradation of the read across substance, C12-16 ADBAC, in waste water according to OECD Guideline 303A (continuous activated sludge test (CAS)), in compliance with GLP. The microorganisms were exposed to a nominal concentration of 49 mg/L (36 mg/L carbon) of the test substance for a period of 58 d. A control fed only with domestic wastewater was included in the study. A strong increase in the concentration of non-purgeable organic carbon (NPOC) was noted on Day 2 in the test units. This was probably caused by toxicity of the test substance. The activated sludge acclimatised to the test substance within a few days, resulting in a decrease of the NPOC concentrations. After 3 weeks, very high carbon removal percentages were achieved. The mean removal percentage in the test unit assessed with a HLPC-MS/MS method was 99.998%, indicating ultimate biodegradation. Removal of the test substance from the influent through adsorption onto sludge was only 0.023% on Day 58, showing that the main mechanism of elimination was biodegradation.Based on the results of the read across study, the test substance was removed from waste water at a very high percentage (approximately 99.998%) in the continuous activated sludge test. Removal of the test substance from the influent through adsorption onto sludge was only 0.016 to 0.023% at two sampling times, demonstrating that the test substance was removed almost completely and biodegraded. This suggests that the test substance biodegrades almost completely in conventional biological waste water treatment plants (van Ginkel, 2007). Based on the results of the read across study, Oleyl TMAC is also considered to biodegrade almost completely in conventional biological waste water treatment plants.
Based on the results of the read across study, Oleyl TMAC is also considered to biodegrade almost completely in conventional biological waste water treatment plants.
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