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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

The 72-h ErC50 is 780 mg/l and the 72-h NOEC is 77 mg/l in Pseudokirchneriella subcapitata.

Key value for chemical safety assessment

EC50 for freshwater algae:
780 mg/L
EC10 or NOEC for freshwater algae:
77 mg/L

Additional information

Several studies with algae are available; all are conducted according to accepted guidelines. One study was considered invalid as test concentrations could not be maintained and the cell concentration in the controls in all replicates was smaller after 72 hours than after 48 hours (Springborn Laboratories Inc., 1995). From the other studies the most critical study is chosen as the key study. The lowest 72-h ErC50 value is 780 mg/l and the 72-h NOEC is 77 mg/l (SafePharm Laboratories, 2003a). These values are used in the assessment.