Registration Dossier
Registration Dossier
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EC number: 701-171-0 | CAS number: -
PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Due to the differences in the physicochemical characteristics of the components of the reaction mass of 2,4,6-tris(1-phenylethyl)phenol and 2,6 -bis(1- phenylethyl)phenol, the components will not behave as a single compound. Significant variation is expected in the environmental fate and behaviour of these compounds. Therefore, the PBT assessment will address the constituents individually.
TSP
TSP was found to be not PBT and not vPvB based on the following findings:
- Persistene: a biodegradation test in 4 different soils yielded DT50 values of 3.13 to 12.5 days at 12°C. Hence, TSP is not persistent nor very persistent in soil.
- Bioaccumulation: Two bioaccumulation studies yielded kinetic, 5% lipid content BCF values of 2682 - 2706 L/kg ww, and a growth-corrected, kinetic, 5% lipid content BCF value of 3972 L/kg ww. Hence, TSP is bioaccumulative but not very bioaccumulative.
DSP
DSP was found to be not PBT and not vPvB based on the following findings:
- Persistence: DSP is found to be not readily biodegradable.
- Bioaccumulation: In a fish dietary bioaccumulation test with a mixture of TSP and DSP, a rapid depuration of DSP was observed. Hence, DSP is not bioaccumulative nor very bioaccumulative.
MSP:
Based on the determination of the log Kow of 4 -MSP and 2 -MSP (log Kow < 4.5) , MSP has no potential for bioaccumulation.
- Likely routes of exposure:
The reaction mass is manufactured and used under striclty controlled conditions. Therefore, there is no likely route of exposure to the reaction mass.
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