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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic plants other than algae

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Administrative data

Link to relevant study record(s)

Description of key information

ErC50 (7 d) > 1000 mg/l for frond number (Probit regression model)

ErC50 (7 d) > 1492 mg/l for biomass as dry weight (Probit regression model)

Key value for chemical safety assessment

Additional information

The substance was tested for toxicity on freshwater aquatic plants, i.e. Lemna minor, according to OECD guideline 221 under static exposure conditions.

Concentrations were measured by photometry during the test. These analyses confirmed the right dosage and showed that concentrations were stable over the whole 7 -day period and remained within 80 - 120 % of the nominal concentrations. Nominal concentrations were 1000, 250, 100, 25 and 10 mg/l of active ingredient.

At the end of the test, appearance of plants showed differences with respect to blank control in a dose dependent way. The tendency was towards smaller fronds and shorter black coloured roots.

No signs of precipitation were noted at any concentration.

Effects concentrations (EC10 and EC50), based on growth rate and yield, were determined using Logit regression model, for both frond number and dry weight.

No observed effect concentrations (NOEC) were estimated by Dunnett's test.

The EC50 values after 7 days resulted to be:

- > 1000 mg/l of active ingredient, referred to the growth rate of frond number,

- 1492 mg/l of active ingredient, referred to the growth rate of dry weight.