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Classification & Labelling & PBT assessment

PBT assessment

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PBT assessment: overall result

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

Lanthanum acetate consists of an organic and an inorganic part. The organic acetate part of the molecule is readily biodegradable. For the inorganic part (lanthanum) the criteria for PBT or vPvB identification of Annex XIII to the regulation do not apply.

Lanthanum acetate is proven to be readily biodegradable (passing the 10-d time window criterium) in an OECD 301B test. This result is due to biodegradation of the acetate part of the molecule only, because the lanthanum part is inherently not biodegradable. The available evidence on degradation is not sufficient for an assessment based on the Annex XIII criteria for persistence (P and vP). However, since the substance (acetate part) is demonstrated to be readily biodegradable, the screening criteria for P and vP are not met and hence it can be concluded that the acetate part is not P or vP.

The available evidence on bioaccumulation potential for the acetate part of the molecule is not sufficient for an assessment based on the Annex XIII criteria for this endpoint. Following the very low log Kow for both acetic acid and sodium acetate however, the screening criteria for bioaccumulative potential (B and vB) are not met and hence it can be concluded that the acetate part is not B or vB.

The available evidence on the toxicity potential for the acetate part of the molecule is not sufficient for an assessment based on the Annex XIII criteria for this endpoint. However, the available (acute) toxicity information demonstrates that the screening criteria for toxicity potential (T) are not met.

Based on the above, the acetate part of the molecule should not be considered as a PBT/vPvB substance. The PBT assessment does not apply to inorganic substances and hence no PBT assessment is performed for the lanthanum part of the molecule.