Registration Dossier
Registration Dossier
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EC number: 241-646-5 | CAS number: 17671-27-1
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- Docosyl docosanoate
- Type of composition:
- boundary composition of the substance
- State / form:
- solid: particulate/powder
- Reference substance:
- Docosyl docosanoate
- Name:
- Docosyl docosanoate
- Type of composition:
- legal entity composition of the substance
- State / form:
- solid: particulate/powder
- Reference substance:
- Docosyl docosanoate
- PBT status:
- the substance is not PBT / vPvB
- Justification:
The PBT Assessment is based on the criteria set out in the “Guidance on information requirements and chemical safety assessment, Chapter R.11: PBT Assessment” (ECHA, 2017).
Persistence
Docosyl docosanoate (CAS 17671-27-1) is readily biodegradable in one study according to OECD 301C (75.3% (BOD) after 28 d). Thus, the test substance does not meet the screening criterion for persistency and it is not considered to be P or vP.
Bioaccumulation
Docosyl docosanoate (CAS 17671-27-1) has a log Kow of > 10 (KOWWIN v1.68) indicating a potential for bioaccumulation. But due to the low water solubility, rapid environmental biodegradation and metabolisation via enzymatic hydrolysis, a relevant uptake and bioaccumulation in aquatic organisms is not expected. Enzymatic breakdown will initially lead to the free fatty acid and the free alcohol. From literature it is well known, that these hydrolysis products will be metabolized and excreted in fish effectively (Heymann, 1980; Lech & Bend, 1980; Lech & Melancon, 1980; Murphy & Lutenske, 1990; Sand et al., 1973). Thus, taking all information into account, the test substance is not considered to be B or vB.
Toxicity
Long-term toxicity testing with Scenedesmus subspicatus and Daphnia magna resulted in no effects up to the limit of water solubility. All available short-term toxicity data did not result in any toxicity up to the water solubility limit as well. Moreover, docosyl docosanoate (CAS 17671-27-1) is not classified according to the consolidated version of Regulation (EC) No 1272/2008 and all further amendments (ATPs). Therefore, the substance does not meet the T-criterion.
Conclusion
In conclusion, the substance is not considered to be PBT or vPvB.
Referenceopen allclose all
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