Registration Dossier
Registration Dossier
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EC number: 267-135-7 | CAS number: 67801-15-4
Endpoint summary
Administrative data
Description of key information
Additional information
An appropriate structural analogue (3-methyl-5-(2,2,3-trimethylcyclopent-3-en-1-yl)pent-4-en-2-ol, tradename Ebanol) was used as read-across to address the data requirements describing the environmental fate of 3-methyl-5-(2,2,3-trimethylcyclopent-3-en-1-yl)pent-4-en-2-one (Ebanone). The environmental fate of the target substance and source substance are anticipated to be similar due to their common carbon skeleton and similar physical-chemical properties. Therefore, Ebanol is considered a suitable substance to read-across to Ebanone and so these data are considered suitable to address the environmental fate of this substance (for further details see read-across justification document attached in section 13).
The read-across substance was found to be readily biodegradable under the strict testing conditions of the OECD 301F guidelines. In addition, at the concentration used in the test (100 mg/L), it was not inhibitory to micro-organisms.Assessment of hydrolytic stability was carried out according to OECD Guideline 111 using the read-across substance. The half-life at 25°C was shown to be greater than 1 year for pH 4, pH 7 and pH 9.
The Koc for the read-across substance was determined to be 1585 according to an OECD 121 study.
The bioaccumulation potential of the substance was considered using the estimated partition coefficient (see IUCLID section 4.7 for details). An estimated Log Kow of 4.4 indicates that the substance has the potential to bioconcentrate for EU CLP classification purposes (the CLP Regulation EC 1272/2008 cut-off value is ≥ 4) but does not meet the bioaccumulation screening criterion of > 4.5 for the purposes of the PBT assessment.
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