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Ecotoxicological information

Toxicity to aquatic plants other than algae

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Description of key information

Triclosan is acutely very toxic to higher plants.

Key value for chemical safety assessment

Additional information

Data on the effect of Triclosan on the exposure of higher plants have been investigated in several studies on Lemna gibba and Lema minor. The effect data are summarised in the table below.

The PNEC aqua has been derived follwing the sensitivity distribution method using all reliable longterm effect data.

Reference

RL

Species

Exp.

Effect level

Value (µg/L)

Nom./

meas.

Remark

Acute effect data

Ciba-Geigy Corp. (1997).
Report no. 21-02-1

2

Lemna gibba

7 d

EC50

> 62.5

nom.

Küster et al. (2007)

2

Lemna minor

7 d

EC50

26.3

nom.

Longterm effect data

Küster et al. (2007)

2

Lemna minor

7 d

EC10

3.16

nom.

Fulton et al. (2009)

2

Lemna gibba

7 d

NOEC

10

meas.

low nutrient level

Ciba-Geigy Corp. (1997).
Report no. 21-02-1

2

Lemna gibba

7 d

EC10

17.7

nom.

Fulton et al. (2009)

2

Lemna gibba

7 d

NOEC

30

meas.

high nutrient level

Exp.: exposure duration; Meas.: measured; Nom.: nominal; RL: Reliability