Registration Dossier

Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

PBT status:
the substance is not PBT / vPvB
Justification:

Based on the expected releases and partitioning behavior of PMM, laboratory studies on the biodegradation and bioaccumulation in the water, sediment and soil compartments are not relevant for the evaluation of PBT properties of this substance. An evaluation of its fate in water and soil shows that it is rapidly removed by volatilization. This substance will not partition into water or soil and is, therefore, not persistent in these media. The “B” criterion in aquatic organisms is not met due to lack of exposure and the laboratory-determined log Kow of 4.3. PMM and all other category members are not acutely or chronically toxic to aquatic organisms at the limit of media solubility. An aquatic chronic NOEC of 0.295 mg/L has been determined via readacross. Data from mammalian studies on category members and the calculated KOA of PMM indicate that this substance is not toxic to and will not bioaccumulate in air-breathing organisms. Therefore, PMM does not fulfill the criteria for bioaccumulative (“B”) or very bioaccumulative (“vB”) or toxic (“T”).

 

The overall conclusions of the preliminary PBT assessment, based on available data, are that the criteria for PBT/vPvB are not met based on expert judgment and laboratory data. Further testing to confirm lack of bioaccumulation and chronic aquatic toxicity is not deemed necessary due to lack of exposure.

Likely routes of exposure:

Not applicable.