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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

(Benzoato-O,O')hydroxy(octadecanoato-O,O')aluminium is considered to be readily biodegradable. This result is based on read across from aluminum, benzoate C16-18-fatty acids complexes which reached 79% degradation after 28 days, meeting the 10-day window, and therefore is considered to be readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

As no data was available for the ready biodegradability of (benzoato-O,O')hydroxy(octadecanoato-O,O')aluminium, the endpoint was read across from the substance aluminum, benzoate C16-18-fatty acids complexes. The ready biodegradability of the read-across substance was determined in a proprietary, GLP-compliant CO2 evolution test following OECD guideline 301B (Harlan 2013). The study is considered reliable and suitable for use for this endpoint. The results from this study also indicate that the aluminium ion is not inhibitory to microorganisms, and does not prevent the ready biodegradation of the organic component.

Aluminum, benzoate C16-18-fatty acids complexes (CAS No. 94166-87-7, EC No. 303-385-6) is considered suitable for read across to (benzoato-O,O')hydroxy(octadecanoato-O,O')aluminium as it is structurally similar, being an approximate 2:1 mixture of (benzoato-O,O')hydroxy(octadecanoato-O,O')aluminium and (benzoato-O,O')hydroxy(hexadecanoato-O,O')aluminium. The only significant difference is the presence of about 30% of the aluminium complex containing the saturated C16-fatty acid, hexadecanoate, in place of the saturated C18-fatty acid, octadecanoate. This small difference in composition is expected to have no adverse influence on ready biodegradability.