Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

MDI category substances only occur in a grease base designed to minimise leaching of the thickener. No experimental bioaccumulation data are available for MDI category substances. Although the predicted log octanol-water partition coefficient (log Kow) data indicate constituents of Diurea 2 and Diurea 4 have the potential to bioaccumulate, predicted bioconcentration factors (BCF) suggest otherwise. The results of the Tier 1 BCF screening calculations (BCFBAF v2.01) indicate that representative components of Diurea 2 and Diurea 4 all have predicted BCF values <2000 L/kg.

As the log octanol-water partition coefficient for both substances is predicted to be above 6, they are expected to reside within the grease base oil matrix and as such, the levels of exposure will be minimal and bioavailability will be restricted (as discussed further in Section 5.6 of IUCLID). On the basis of the information and data provided, MDI category members are not expected to be bioaccumulative.

Additional information