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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Bioaccumulation: aquatic / sediment: BCF = 290 (mean of values at each sampling point for lower test concentration) (Method equivalent to OECD 305 C, with restrictions)

Key value for chemical safety assessment

BCF (aquatic species):
290 dimensionless

Additional information

A fish bioaccumulation study is available which used a method equivalent to or similar to OECD Test Guideline 305C, with restrictions. Dispersant was used, and the concentrations of the test substance were above the predicted water solubility. Therefore, the results at the lowest concentration are likely to be most reliable.

4,4,13,13 -Tetraethoxy-3,14-dioxa-8,9-dithia-4,13-disilahexadecane (S2) hydrolyses at a moderate rate (half-life 40 - 90 h at pH7 and 20-25°C

, predicted) in contact with water to the corresponding silanol hydrolysis product and ethanol. The silanol hydrolysis product and ethanol have low log Kow values (-3 and -0.3 respectively), and thus have low potential for bioaccumulation.