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EC number: 942-854-5 | CAS number: -
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
ErC50 = 256 mg/l
Key value for chemical safety assessment
- EC50 for freshwater plants:
- 256 mg/L
- EC10 or NOEC for freshwater plants:
- 25.6 mg/L
Additional information
Acid Red 097:1 is a multiconstituent substance composed by the acidic and the sodium salt forms of the same structure. The test was performed on the sodium salt of the Acid Red 079:1. The results on the tested substance are the following:
Growth rate inhibition (ErC50) and yield inhibition (EyC50) for the endpoint frond numbers was estimated to be 256 – 2560 mg/l nominal concentration.
Growth rate (NOErC) and yield (NOEyC) for the endpoint frond numbers were 25.6 mg/l nominal concentration, as determined by Dunnett's test.
Growth rate inhibition (ErC50)for the endpoint dry weight was estimated to be 256 – 2560 mg/l nominal concentration
Yield inhibition (EyC50) was estimated to be 25.6 – 256 mg/l nominal concentration.
Growth rate (NOErC) and yield (NOEyC) for the endpoint dry weight were < 25.6 mg/l nominal concentration, as determined by Dunnett's test.
Considering the high similarity between the structures and the composition of the substance, , Acid Red 097:1 is expected to show the same toxicity to aquatic plants as the sodium salt form.
According to the CLP Regulation (EC) n. 1272/2008, 'acute (short-term) hazard’ means for classification purposes the hazard of a substance or mixture caused by its acute toxicity to an organism during short-term aquatic exposure to that substance or mixture.
The result on aquatic plants confirm no concern for the aquatic compartment, therefore no classification is warranted under the CLP Regulation.
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