Registration Dossier
Registration Dossier
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EC number: 220-482-8 | CAS number: 2781-11-5
Endpoint summary
Administrative data
Description of key information
The registered substance is not readily biodegradable. Therefore, in the absence of other studies (e.g. readily/enhanced/simulation biodegradability tests), the substance is considered potentially persistent (P) or very persistent (vP) in the environment.
Regarding abiotic degradation, the hydrolysis potential of the substance is both pH and temperature dependent. Under acidic conditions, the substance is quite stable, showing a half-life of over 100 days. At neutral pH, the half-life was determined to be less than 100 days. Under alkaline (pH 9) conditions, the substance was shown to be unstable, with half-life between 13 and 38 hours. As the concern for P/vP screening cannot be removed by significant and substantial loss of the parent substance by hydrolysis alone, this hydrolysis study has no impact on the Persistence assessment. The substance is considered potentially P or vP in the environment.
However, the registered substance has a log Kow of -1.9, suggesting that it does not have an important affinity for lipids present in organisms, and has consequently a low potential of bioaccumulation. The registered substance is not considered to be bioaccumulative according to CLP (log Kow < 4.0) and PBT criteria (log Kow < 4.5).
Based on the chemical structure, the substance is not expected to be ionisable at environmental pH (pH 4-9), and according to an experimental study (OECD TG 115 / EU Method A.5; Kremer, 2018), the substance is not surface active. Therefore, as the adsorptive properties of the substance are solely driven by lipophilicity, and considering a log Pow of the substance < 3 (namely -1.9), an experimental adsorption study does not need to conducted. The adsorption coefficient Koc of the substance is estimated at 0.552 L/kg (log Koc = -0.2581) according to a QSAR prediction (KocWin v2.00; Kulhavy, 2022). This results indicates that the substance is very high mobile in soils (according to P.J. McCall et al., 1981).
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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