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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Log Kow (alpha-pinene) = 4.42
regression-based estimate, BCFBAF v3.01; BCF = 383 L/kg wet-wt
Arnot-Gobas upper trophic (including biotransformation), BCFBAF v3.01; BCF = 1421 L/kg wet-wt
TGD part. II, eq. (74); BCF = 1140 L/kg wet-wt
geometric mean = 852.90 L/kg wet-wt

Key value for chemical safety assessment

BCF (aquatic species):
852.9 L/kg ww

Additional information

Eucalyptus oil is a natural complex substance. It is a mixture of several components, but three of them represent 85% of that mixture. Log Kow of each of these three components were determined. Without available experimental BCF studies, Eucalyptus oil BCF value was determined regarding the highest log Kow value of these components. The highest log Kow value is for alpha-pinene (4.42), therefore it was assumed that BCF of alpha-pinene would be conservative enough for the mixture.

Three calculation approaches were performed (Table1):

-         Regression-based estimate, BCFBAF v3.01

-         Arnot-Gobas upper trophic (including biotransformation), BCFBAF v3.01

-         TGD part. II, eq. (74)

Table 1: Calculation approaches for BCF values of alpha-pinene.

 

log BCF

BCF (L/kg wet-wt)

regression-based estimate, BCFBAF v3.01

2.58

383

Arnot-Gobas upper trophic (including biotransformation), BCFBAF v3.01

3.153

1421

TGD part. II, eq. (74)

3.057

1140

geometric mean

2.919

852.90