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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to aquatic algae: EC50 - > 6.9 mg/L; NOEC - 3.9 mg/L

Key value for chemical safety assessment

EC50 for freshwater algae:
6.9 mg/L
EC10 or NOEC for freshwater algae:
3.9 mg/L

Additional information

Algal growth inhibition has been investigated in a 72 hour test according to OECD/EU test methods.The EC50 values for inhibition of specific growth rate (ErC50) and yield (EyC50) was >6.9 mg/L. The NOEC for inhibition of specific growth rate (ErC0) and yield (EyC0) was 3.9 mg/L. In accordance with ECHA guidance on information requirements and chemical safety assessment, Chapter R.7b: Endpoint specific guidance, the ErC50 endpoint is used in DNEL derivation. This is because use of values based on biomass cannot be applied to an analysis of results from a system in exponential growth without logarithmic transformation.

(Q)SAR estimation indicates an EC50 of 0.418 mg/L, lower than the experimentally determined value.