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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Calculation with BCFBAF v3.00 (EPIWIN software by US-EPA): 70.79 L/kg wet-wt, strong bioaccumulation is not expected.

Key value for chemical safety assessment

BCF (aquatic species):
70.79 L/kg ww

Additional information

Benzenesulfonic acid, mono-C20-24 (even)-sec-alkyl derivs., para-, sodium salts (generic name: C20 -24 sodium sulfonate) has a predicted Bioconcentration Factor (BCF) of 70.79 L/kg (Chemservice S.A., 2015c) and an experimental determined partition coefficient (logPow) of > 7 at 25 °C (Tait and Laud, 2000). Thus, a strong bioaccumulation in aquatic biota is not expected. Only limited bioaccumulation is assumed for compounds with a logPow < 4.5 or > 6 (based on ECHA REACH Guidance R.11 PBT Assessment). Concerning logPow exceeding 6, a gradual decrease of the Bioconcentration Factor (BCF) is observed practically. Examples are discussed in a literature study of the German Federal Environment Agency (Umweltbundesamt (Ed.): Comparative analysis of estimated and measured BCF data (OECD 305). Report No. (UBA-FB) 001435/E, ISSN: 1862-404,Dessau, March 2011).