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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

With high probability acutely not harmful to aquatic algae.

Key value for chemical safety assessment

EC50 for freshwater algae:
1 062 mg/L
EC10 or NOEC for freshwater algae:
7.27 mg/L

Additional information

Parent compound methyl formate

Data on growth inhibition of aquatic algae are available from two static studies without analytical test item verification performed according to the German Industrial Standard DIN 38412 Part 9. The 72 -h ErC50values are 1062 and 1079 mg/L, respectivel, related to the endpoint growth rate. In conclusion, no acutely harmful effects to aquatic algae are to be expected. The lower of the two NOErC values was estimated to be 7.81 mg/L (BASF AG, 1988, 1989).

Hydrolysis product formic acid/formate

Data on growth inhibition of aquatic algae are available from GLP guideline studies performed with freshwater and marine species. In both cases the 72 -h EC50values were > 1000 mg/L. A NOEC of 100 mg/L is assumed for the formate ion (Osca, 1994; Fraunhofer, 2005).

Hydrolysis product methanol

In a 96 -h test with Selenastrum capricornutum following OECD TG 201 an EC50 of 22000 mg/L based on growth rate was determined (Cho et al., 2008).