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Ecotoxicological information

Toxicity to aquatic plants other than algae

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Link to relevant study record(s)

Description of key information

With regard to freshwater aquatic plantsa semi-static test with Spirodella polyrrhiza (duckweed) was conducted, and generated a 10d-NOEC of 6.5 mg B/L. The value is based on measured B-levels, representing the effect of boron (added as boric acid) on the growth rate of this floaring aquatic plant. It should be noted that the value reported here here represents an ‘added’ concentration level and may therefore deviate slightly from values reported elsewhere.


No reliable long-term studies with marine aquatic plants were identified in scientific literature.

Key value for chemical safety assessment

Additional information

The chronic reference value for the higher plant Spirodella polyrhiza (duckweed) of 6.5 mg Mo/L is taken forward for the determination of a PNEC for the aquatic freshwater compartment, using the statistical extrapolation method.