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PBT assessment

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PBT assessment: overall result

PBT status:
the substance is not PBT / vPvB

Tetralithium 5,5'-[vinylenebis[(3-sulphonato-4,1-phenylene)azo]]bis[3-methylsalicylate] is considered to be “Not Readily Biodegradable“ (Neuhahn, 2017). It must therefore be considered as potentially P or vP. The partition coefficient of the test item was calculated from the octanol solubility (0.022 g/l) and the water solubility (240 g/l) at 20 °C and was determined to be log Pow = - 4.0 (Jungheim, 2017). The substance is therefore neither B nor vB.

Regarding the T criterion one chronic study with the aquatic freshwater plant Lemna minor was available. The lowest determined NOEC within this study was found to be 3.1 mg/L, thus exceeding the threshold value of 0.01 mg/L (Knauer, 2018). As the substance is not classified according to any criteria relevant for the T criterion the substance is not T.

As the substnace is neither B or vB nor T, further testing with regard to the P criterion is not required and the substance can be considered as neither vP/vB nor PBT.