Registration Dossier
Registration Dossier
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The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: - | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The log Koc for Diurea 8 is calculated to be 5.45 - 14.03 using the Gerstl equation. The log Koc for Diurea 8 was determined to be 4.97 - 10.0 using the MCI method and 4.81 - 10.25 using the log Kow QSAR models.
Key value for chemical safety assessment
Additional information
The log Koc for Diurea 8 has been calculated using the Gerstl equation (Gerstl 1990). This is supported by QSAR estimates using the MCI and log Kow methods (US EPA 2009). These methods are discussed in the ECHA endpoint specific guidance and are considered appropriate techniques for this endpoint.
Diurea 8 only occurs in a grease base specifically designed to minimise leaching. The isolated thickener is estimated to have a water solubility of less than 0.01 mg/L and as the log octanol-water partition coefficient is predicted to be above 6 (Dawick 2012), Diurea 8 is expected to reside within the grease base oil matrix. As such, Diurea 8 is not expected to partition to water and hence is not anticipated to be available for adsorption to soil or sediment. In the event that constituents of Diurea 8 leached out of the base oil grease matrix, environmental partitioning would be primarily to soil or sediment. However, this process is considered highly unlikely and the exposure concentrations of Diurea 8 which would be available for bioaccumulation are extremely limited.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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