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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Predicted low hazard

Key value for chemical safety assessment

EC50 for freshwater algae:
100 mg/L

Additional information

From assessment of similar sulphonated azo substances, it is concludes that CJ308 need not be classified as hazardous to aquatic organisms on the basis of effects to aquatic plants. Although some references show an inhibition of growth rates biomass at concentrations below 100 mg/l, it is considered very likely that this is mainly due to absorption of light at wavelengths liked to photosynthesis.

 

No convincing evidence has been found that the substance causes harm to aquatic plants, other than shading from the coloured material.  

 

The read-across is valid and is backed up by review documents, including an assessment of azo dyes by the Danish EPA that conclude low environmental toxicity to aquatic organisms.