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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Description of key information

An appropriate and sensitive bioassay for organic volatile compound was conducted on Chlamydomonas reinhardtii (72 h, static). An EC50 of 9.12 mg/L was determined.

Key value for chemical safety assessment

EC50 for freshwater algae:
9.12 mg/L
EC10 or NOEC for freshwater algae:
3.94 mg/L

Additional information

Two studies were selected to assess the toxicity of 1,1-dichloroethylene on aquatic algae.

 The study of Brack and Rottler (1994) was conducted on freshwater living species Chlamydomonas reinhardtii, with an exposure duration of 72 h in a static test system. The results are well documented and scientifically acceptable: EC50of 9.12 mg/L and EC10of 3.94 mg/L.

 The study of Geyer et al. (1985) was conducted on freshwater living species Scenedesmus subspicatus with an exposure duration of 96 h and resulted in an EC50of 410 mg/L and an EC10of 240 mg/L. However, the test system is not appropriate for volatile compound and reported values are probably higher than the real one.