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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Maleic acid is not classified for acute aquatic toxicity.

Key value for chemical safety assessment

EC50 for freshwater algae:
74.32 mg/L
EC10 or NOEC for freshwater algae:
11.8 mg/L

Additional information

In key study with Pseudokirchneriella subcapitata revealed an EC50 of 74.32 mg/l was reported with an non-neutralized test solution, based on algae growth-rate (Bopanna, 2010). pH adjusted test solution showed a decrease in effects. As a worst-case approach the EC50 estimated from non-neutralized samples was taken for further assessment.