3-methyltetrahydrothiophene 1,1-dioxide

Endpoint summary

Description of key information

Combination of the SimpleTreat STP and Fugacity Level III models (use of the distribution from the STP as the inputs for the Fugacity calculations) indicates that the substance will mainly be in the water compartments because of its high solubility, whereas only sparsely adsorbed on solid matter (Koc estimated with the MCI method in AOP v1.93 as equal to 14.57 L/kg, and by EUSES 2.1 for non-hydrophobics as equal to 180.6 L/kg) estimated and moderately volatilised to air. In addition, the substance is considered as stable notably regarding hydrolysis, as not biodegraded in a standard municipal Sewage Treatment Plant, but its hydroxyl radical photolysis half-life in air is estimated 23.765 hours (AOP v1.92 prediction is 8.901 hours, but EUSES minimum recommended value is 23.765 hours). The initial emissions going through a standard STP, and from it to air, water and soil (sludge application on soil), may be, in a first equilibrium stage and without taking into consideration any RMM or specific biodegradation processes, distributed in the environment as follows: 0.012% in air, 98.319% in water, 1.271% in soil, 0.039% in sediment, and 0.359% removed from the system. The considered removal process is photodegradation, but it should be noted that several studies indicate that the substance can be biodegraded by adapted microorganisms in both industrial STP facilities or in contaminated soils). Substance is not expected to bioaccumulate (BCF predicted by EUSES is 1.41 L/kg wet weight), because it is not lipophilic (log Kow is equal to -0.4).