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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

The potential for bioaccumulation of Soybean oil, epoxidized, reaction products with methanol (CAS-No. 85586-35-2) in aquatic organisms is assumed to be low.

Key value for chemical safety assessment

Additional information

The two estimations with BCFBAF v3.01 calculate the minimum and maximum level of reaction products with methanol in Soybean oil, epoxidized:

- Soybean oil, epoxidized :

EPISuite v4.1/BCFBAFv3.01: A BCF value of 3.216 (log BCF = 0.5) was estimated on the basis of the log Kow of 14.84. Using the Arnot-Gobas method including biotransformation rates the BCF for the upper trophic level was estimated at 0.893 (log BCF = -0.049) (BASF, 2013).

- Soybean oil, epoxidized, with maximum open epoxide-rings (reaction with methanol):

EPISuite v4.1/BCFBAFv3.01: A BCF value of 104.5 (log BCF = 2.019) was estimated on the basis of the log Kow of 10.08. Using the Arnot-Gobas method including biotransformation rates the BCF for the upper trophic level was estimated at 0.8976 (log BCF = -0.047) (BASF, 2013).

CONCLUSIONS
B
CF values are in the range of 0.89 (Arnot-Gobas-method). Considering mitigating factors like biotransformation, water solubility and molecular size, there is low potential for bioaccumulation. In addition, due to the low water solubility exposure of aquatic organisms to significant amounts is unlikely. Therefore, unacceptable risks due to possible bioaccumulation are not expected. Furthermore, due to a molecular mass greater than 700, the test substance is not readily taken up by fish, because of possible steric hindrance at passage of gill membranes or cell membranes of respiratory organs (Technical Guidance Document on Risk Assessment (TGD) Part 2 (2003), Institute for Health and Consumer Protection, European Chemicals Bureau). In addition, based on current knowledge, a calculated log Kow of 10 or above is taken as an indicator of reduced bioconcentration. (Chapter R.7C-Endpoint Specific Guidance; R7.10.3.4)