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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

HFO-1234yf has low toxicity to algae.

Key value for chemical safety assessment

Additional information

HFO-1234yf has low toxicity to alga with a 72 hr EC50 greater than 100 mg/l. Under the conditions of the present study with the fresh water green algae Selenastrum capriconutum, the NOEC of HFO-1234yf for growth of this fresh water algae species is > 75 mg/l. Since no growth inhibition was recorded at this level and at the maximum average exposure of 114 mg/l, in one of the treated solutions, it can be safely concluded that the EC50 of HFO-1234yf for algal growth is > 100 mg/l based on both the area under the growth curve and growth rate. HFO-1234yf can be classified as not harmful to fresh water alga.