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Environmental fate & pathways

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The test substance has a half-life in water that ranges from 16 to 19 days at pH 4 to 9 and 20 degrees C. Under normal environmental conditions, non-enzymatic abiotic degradation by hydrolysis is expected to play an important role in the degradation of the test substance in the environment. It did not meet the criteria for Ready Biodegradation based on the results of ready biodegradation testing. However, the test substance did meet the criteria for inherent biodegradation (OECD 302C, Inherent Biodegradability: Modified MITI Test (II)). By 28 days, the test substance attained almost 78% biodegradation based on BOD measurements. Testing beyond a test for inherent biodegradation, such as a simulation biodegradation test, was waived based on testing performed on structurally similar substances (read-across) and an expert system capable of simulating microbial degradation.

If released to air, the test substance is expected to exist in both the vapour and particulate phases. In the vapour-phase, it is expected to quickly degrade. Removal in the particulate-phase will occur primarily as dry deposition as it is not expected to partition to the water phase. If released to soil, it is expected to partition strongly to soil resulting in a low mobility in soil. Volatilisation from moist soil surfaces is not expected to be an important fate process. If released into water, it is expected to adsorb to suspended solids and sediment in the water column. Volatilisation from water surfaces is not expected to be an important fate process.

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