Registration Dossier
Registration Dossier
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EC number: 208-904-9 | CAS number: 546-56-5
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- Octaphenylcyclotetrasiloxane
- Type of composition:
- boundary composition of the substance
- State / form:
- solid: particulate/powder
- Reference substance:
- Octaphenylcyclotetrasiloxane
- PBT status:
- the substance is not PBT / vPvB
- Justification:
The substance does meet the screening criteria for persistence (P/vP) in the aquatic compartment.
The substance does not meet the screening criteria for bioaccumulation B or vB based on weight of evidence of high log Kow (9.0) and high molecular size (Dmax16.9 Å) and weight (793.19 g/mol). The substance does not meet the definitive criteria for bioaccumulation based on a lipid-normalised kinetic BCF value of 284 L/kg ww (read-across from a structurally related substance) and weight of evidence determination using expert judgement; it is not B or vB.
The substance does not meet the definitive criteria for toxicity; it is not T.
Reference
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