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Environmental fate & pathways

Biodegradation in soil

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Reference
Endpoint:
biodegradation in soil: simulation testing
Data waiving:
other justification
Justification for data waiving:
other:
Transformation products:
not measured

Description of key information

Testing for biodegradability in surface water according to OECD 309 classifies the substance as vP. ECHA Guidance R.11 (V 3.0, p. 53) states that “The P/vP assessment should cover all three (five) environmental compartments (water, marine water, sediment, marine sediment, soil). However, a substance can already be concluded as P or vP if the criteria are fulfilled for one compartment only. For the purpose of reducing efforts of testing, the test should be selected in such a way that it reflects the worst case of persistence potential.” As stated in ECHA decision number SEV-D-2114341466-49-01/F "surface water seems to be a compartment of concern". For this compartment the vP criterion was now confirmed, triggered by the der constituent 2,2'-Dimethyldiphenylether (CAS 4731-34-4) for which a DT50 of 63d was established. Thus, additional testing of the soil compartment is rendered uneccesary.

Key value for chemical safety assessment

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