Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The substance is considered to be readily biodegradable as demonstrated in the Closed Bottle Test.

The 10-day time window has been ignored as a pass/fail criterion.

Moreover, the substance is a multi-constituent substance with structurally similar constituents which may pass the 10 day window criterion individually while that is not seen in the mixture and in the molecule a hydrophilic group is linked to a hydrophobic moiety. Biodegradation of both moieties of surfactants requires the concerted action of at least two microorganisms as a single organism usually lacks the full complement of enzymatic capabilities. The biodegradation of the two moieties of 1 -propanamine, 3 -(isodecyloxy)- may be fully in line with the 10 -day window criterion when judged as separate chemicals whereas the sum of the biodegradation curves is not. The biodegradation curve of 1 -propanamine, 3-(isodecyloxy)- should therefore not be used to assess a 10-day window effect.