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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:

Assessment of PBT/vPvB Properties

Summary and overall conclusions on PBT or vPvB properties

 

The available data on degradation, bioaccumulation and toxicity for Oxooil LS9, indicate that the substance does not fulfil the PBT criteria (not PBT) nor the vPvB criteria (not vPvB).

 

PBT/vPvB criteria and justification

Persistence

Although the substance was not readily biodegradable in an OECD TG 310 study and hydrolysis is not considered to be a relevant pathway of degradation, the substance is not expected to be persistent.

A fugacity model (Mackay level III model) demonstrated that the components will predominantly partition to water or volatilise into air to significant amounts. Volatilization from water is predicted to occur rapidly (hours to days), with Henry’s Law Constants (bond method) ranging from 3.14 Pa-m³/mole to 3.77E+005 Pa-m³/mole. Due to its volatility, photodegradation is the major pathway of degradation with half-lives for hydroxyl radical reaction ranging from 1.14 h to 15.49 h; for olefins, additionally reaction with ozone is possible; half-lives ranged from 13.75 min to 22.92 h. Overall, these results indicate fast photodegradation of the substance. Consideration of these degradation processes supports the assessment that the substance will degrade relatively rapidly in the environment and does not persist.

Bioaccumulation

Based on the results in chapter 4.3 Bioaccumulation, Oxooil LS9 is not bioaccumulative (not B) and not very bioaccumulative (not vB).

Toxicity

Based on the results of the aquatic toxicity studies from chapter 7.1 and relevant mammalian toxicity studies in chaper 5, Oxooil LS9 is not Toxic (not T).

 

Emission Characterisation

Because the substance does not fulfil the PBT or vPvB criteria, no emission characterisation has been performed.