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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:

Persistence

The substance is hydrolytically unstable, hydrolysing to the corresponding dicarboxylic acid with a half-life of minutes.

 

The substance is readily biodegradable, although failing the 10-day window criterion. It is reasonable to assume, as testing was undertaken in aqueous media, that the degradation product of the substance is degradable.

 

These data indicate that the substance is not persistent (P).

 

 

Bioaccumulation

The octanol water partition coefficient of the substance is low (Log Kow= 1.29) suggesting only a low potential for the substance to be bioaccumulative.For organic substances with a logKowvalue below 4.5 it is assumed that the affinity for the lipids of an organism is insufficient to exceed the criterion for bioaccumulation (a BCF value > 2000 L/kg).

 

BCF has been calculated using the computer program BCFBAF (v3.00). It is predicted that the substance has a BCF of 3.3 L/kg wet weight. This is in agreement an esperimentally determined BCF on 4-cyclohexene-1,2-dicarboxylic acid (CAS No. 88-98-2), the degradation product of the submission substance, determined according to OECD test methods, which was as follows: < 0.2 at a test concentration of 2 mg/L and < 2 at a test concentration of 0.2 mg/L.

 

These data indicate that the substance is not bioaccumulative (B).

 

 

Toxicity

Aquatic toxicity tests do not indicate the substance meets the criteria to be regarded as toxic.

 

The data indicate that the substance is not toxic (T).