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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Growth rate: EC50 (72h) = 28.2 mg/L and EC10(72h) = 2.3 mg/L for Desmodesmus subspicatus (OECD 201).
Cell number: EC50 (72h) = 22.9 mg/L and EC10(72h) = 2.5 mg/L for Desmodesmus subspicatus (OECD 201).
Growth rate: EC50 (72 h) = 7.16 mg/L for Skeletonema costatum (ISO 8692).

Key value for chemical safety assessment

EC50 for freshwater algae:
28.2 mg/L
EC50 for marine water algae:
7.16 mg/L
EC10 or NOEC for freshwater algae:
2.3 mg/L

Additional information

A GLP-study according to OECD 201 on the toxicity to Desmodesmus subspicatus was performed with Lanthanum trichloride hydrate (Bogers 1995). Based on Lanthanum trichloride, anhydrous, the EC50 (72 h, growth rate) was determined as 28.2 mg/L and the EC50 (72 h, cell number) as 22.9 mg/L, the EC10 (72 h) values for growth rate and cell number were 2.3 mg/L and 2.5 mg/L, respectively. Tai et al. (2010) investigated the acute toxicity to the marine algae Skeletonema costatum with Lanthanum trichloride according to ISO 8692. The EC50 (72 h, growth rate) was 7.16 mg/L, an EC10/NOEC value or effect values, which were based on biomass, were not stated.