Registration Dossier
Registration Dossier
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EC number: 261-645-3 | CAS number: 59185-95-4
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- Dioctyltin bis(2-ethylhexyl b-mercaptopropionate)
- Type of composition:
- boundary composition of the substance
- State / form:
- liquid
- Reference substance:
- Dioctyltin bis(2-ethylhexyl b-mercaptopropionate)
- Name:
- Dioctyltin bis(2-ethylhexyl b-mercaptopropionate)
- Type of composition:
- legal entity composition of the substance
- State / form:
- liquid
- Reference substance:
- Dioctyltin bis(2-ethylhexyl b-mercaptopropionate)
- PBT status:
- the substance is not PBT / vPvB
- Justification:
The PBT Assessment for the substance is based on the criteria set out in the “Guidance on information requirements and chemical safety assessment, Chapter R.11: PBT/ vPvB assessment (ECHA, 2014).
Persistence
The substance is not readily biodegradable. Additionally, it is hydrolytically stable at pH 4, 7 and 9 suggesting a half life time more than a year. Thus, the test substance meets the criteria for persistence and it is considered to be P or vP.
Bioaccumulation
The uptake of an organic substance is driven by its hydrophobicity. For organic substances with a Log Kow value below 4.5 it is assumed that the affinity for the lipids of an organism is insufficient to exceed the B criterion, i.e. a BCF value of 2000 (based on wet weight of the organism, which refers to fish in most cases) (Chapter R.11, version 2.0, November 2014). The substance has a (predicted) LogKow of 16.34. However, the substance is not expected to bioaccumulate based on the predicted BCF value; the value obtained is less than 2000 l/kg. Thus, the substance is not considered to be B or vB.
Toxicity
Studies on the acute oral toxicity of the substance showed that it is expected to be toxic after an acute exposure. Furthermore, the substance it is considered to be toxic after repeated dose exposure via the oral route (classified as STOT RE 1). It is however not classified for carcinogenicity, mutagenicity, reproductive or developmental toxicity. In this case, the substance meets the criteria for toxicity and is considered to be T. Even if the substance meets the criteria for toxicity, in a long term toxicity study to daphnia the NOAEC determined is higher than 0.01 mg/l.
The substance is considered as persistent (P) and toxic (T), but it is not considered as PBT as it does not meet the criterion of Bioaccumulation (P).
Referenceopen allclose all
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