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Environmental fate & pathways

Biodegradation in water: screening tests

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Reference
Endpoint:
biodegradation in water: ready biodegradability
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
Biodegradation of alkylbenzene derivatives occurs starting at the end of the carbon chain. Therefore, read-across to the category of alkylbenzene derivatives can be applied taking into account the carbon chain length. The read across justification document is attached in IUCLID section 13.
Reason / purpose for cross-reference:
read-across source
Key result
Parameter:
other: COD
Remarks on result:
other: Based on the long alkyl chain length of this alkyl benzene derivative, the substance is considered not readily biodegradable
Interpretation of results:
not readily biodegradable
Conclusions:
Based on the long alkyl chain length of C20-C24 alkylbenzene sulfonic acid and the fact that the biodegradation rate of the alkylbenzene derivatives decreases with increasing C chain, the substance is considered not readily biodegradable (conservative approach).

Description of key information

No biodegradation data is available for the target substance. Structural analogues grouped in the category of alkylbenzene derivatives were used to understand the biodegradation profile of the substance. Based on the biodegradation studies of the structural analogues, the long alkyl chain length of C20 -24 alkylbenzene sulfonic acid and the fact that the biodegradation rate of the alkylbenzene derivatives decreases with increasing C chain length, the substance is considered poorly, but not readily biodegradable (conservative approach).

Key value for chemical safety assessment

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