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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Bioaccumulation: aquatic / sediment: BCFss 1450 (0.166 mg/l) and 1890 (0.0141 mg/l); BCFk 1670 ±143 (0.166 mg/l) and 1980 ±318 (0.0141 mg/l), read-across from a structurally-related substance. A value of 2298 (1980 + 318) is used in the exposure assessment as a worst case. The silanol hydrolysis product has a low potential for bioaccumulation. 

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Additional information

Steady-state BCF (BCFss) values of 1450 (0.166 mg/l) and 1890 (0.0141 mg/l), and kinetic BCF (BCFk) values of 1670 ±143 (0.166 mg/l) and 1980 ±318 (0.0141 mg/l) have been read-across from a structurally-related substance triethoxyoctylsilane (CAS 2943 -75 -1). The registration substance and the read across substance have similar hydrolysis half-lives (43 hours and approximately 30 hours at 20-25°C and pH7, respectively) and similar log Kow values (> 6.5 (supporting study 6.1) and 6.41, respectively).

The substance hydrolyses (half-life 43 hoursat 20-25°C and pH 7) and the hydrolysis products have low log Kow values and thus have low potential for bioaccumulation