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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

- 72h-NOEC for Pseudokirchneriella subcapitata: 1 mg/l 
- 72h-EC50: 153 mg/l

Key value for chemical safety assessment

EC50 for freshwater algae:
153 mg/L
EC10 or NOEC for freshwater algae:
1 mg/L

Additional information

In a key study phosphonic acid was tested on Pseudokirchneriella subcapitata according to OECD guideline 201 and under GLP. The test concentrations were verified by analytical measurements. The 72h-NOEC and the 72h-EC50 of phosphonic acid were 1 mg/l and 153 mg/l, respectively (reliability 1).