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Short-term toxicity to aquatic invertebrates

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Key value for chemical safety assessment

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According to Annex VII of REACH Regulation (EC 1907/2006), the study does not need to be conducted if there are mitigating factors indicating that aquatic toxicity is unlikely to occur, for instance if the substance is highly insoluble in water.

Disperse Red 054 is poorly soluble in water, i.e. 94 µg/l at 20 °C, thus exposure of aquatic species to the substance is unlikely; aquatic environment is not considered as target for the substance toxicity.

A similar behaviour is shown by Similar Substance 01. Details on the read-across are available in section 13.

Similar Substance 01 has a solubility in water of 10 µg/l; in the validation of the analytical method, the solubility in ISO medium is found to be significantly lower than the limit of quantification of the analytical method, i.e. 5 µg/l. On these bases, the significance to run studies on aquatic toxicity at concentrations below the LOQ is found to be low; moreover, the aquatic compartment is not considered as target of Similar Substance 01 toxicity.