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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Lactic acid is practically non-toxic to algae, with an ErC50 of 3500 mg/L and an NOEC of 1900 mg/L (nominal). Since dilactide undergoes immediate hydrolysis in contact with water, forming lactic acid, this is the moiety of interest by read-across. Both L- and D-lactic acid are ubiquitous and essential molecules in all biological systems, and organisms are continuously exposed to significant internal and external background concentrations of L- as well as D-lactic acid. Therefore, the information on the aquatic toxicity of L-lactic acid is fully valid for D-lactic acid, and in consequence for DD-lactide.

Key value for chemical safety assessment

EC50 for freshwater algae:
2 800 mg/L
EC10 or NOEC for freshwater algae:
1 900 mg/L

Additional information