Registration Dossier
Registration Dossier
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EC number: 277-923-2 | CAS number: 74563-64-7
Endpoint summary
Administrative data
Description of key information
The likely environmental fate of the substance, if released to the aquatic environment, has been assessed based on the substance’s physico-chemical properties and relevant study data.
The substance has a low water solubility (0.35 mg/L) and has a high octanol/water partition coefficient (logPow > 6.5). The substance is considered to have potential for adsorption to sediments based on its partition coefficient and adsorption coefficient (logKoc > 5.63) and, therefore, may partition from the aquatic compartment into the sediment compartment. These properties alone indicate a potential for the substance to persist in the aquatic environment.
However, the results from the available biodegradation study show the substance to be biodegradable. The test substance achieved 60-70% biodegradation after 28 days and 70-80% biodegradation after 36 days. Thus, the substance passed the criterion (> 60%) for biodegradation, though it was failing to meet the 10-day window needed to be considered readily biodegradable based on OECD criteria.
Therefore, as the substance achieved > 60% biodegradation within 28 days, it can be concluded that it is not expected to persist in the aquatic environment.
The physico-chemical properties of the substance, i.e. its partition coefficient logPow > 6.5, indicate a potential for bioaccumulation in aquatic species. However, a predicted aquatic bioconcentration factor (BCF) of 311 L/kg was obtained for the substance (from EpiSuite program BCFBAF v3.01), which is clearly below the regulatory cut-off values of 2000 L/kg (for B) and 5000 L/kg (for vB), pointing to a low bioaccumulation potential.
Additional information
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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