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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Exact toxicity values could not be achieved because the chemical is insoluble in water and organic solvents. One algal test has been carried out with carbon black (furnace black) Printex 30. No toxic effects were seen in any of the test solutions, which were filtrates of Printex 30 suspensions. The highest concentration tested was the filtrate from a 10,000 mg/L suspension, which had been accommodated for 24 hours at room temperature, on a shaking machine. Thus the study shows that an algal EC50 for the water accommodated filtrate of carbon black is greater than 10,000 mg/L. 

Key value for chemical safety assessment

EC50 for freshwater algae:
10 000 mg/L
EC50 for marine water algae:
10 000 mg/L
EC10 or NOEC for freshwater algae:
10 000 mg/L
EC10 or NOEC for marine water algae:
10 000 mg/L

Additional information