Registration Dossier
Registration Dossier
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EC number: 203-571-6 | CAS number: 108-31-6
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The 72-hour algae NOEC was 150 mg/L (measured as maleic acid in neutralized conditions and the highest dose tested).
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 150 mg/L
- EC10 or NOEC for freshwater algae:
- 150 mg/L
Additional information
Toxicity tests to the freshwater alga Pseudokirchneriella subcapitata (formerly known as Selenastrum carpricornutum) found no effects on either growth or biomass after 72 hours at 150 mg/liter maleic anhydride. Arithmetic average concentration in the highest concentration nominally 150 mg/liter as maleic acid. Because no effects were observed in all concentrations, the EC50 can be estimated as > 150 mg/liter.
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