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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Reference
Endpoint:
toxicity to aquatic plants other than algae
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Justification for type of information:
It is accepted that the parent substance will have hydrolysed in the course of the testing, but OECD Guidance Document on Aquatic Toxicity Testing of Difficult Substances and Mixtures (Guideline 23) was followed.
The method allows for pre-mixing hydrolytically unstable substances in water to mimic the release to the environment via waste-water systems.
Analysis for parent material not possible.
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 221 (Lemna sp. Growth Inhibition Test)
Deviations:
not specified
GLP compliance:
not specified
Analytical monitoring:
not specified
Vehicle:
not specified
Test organisms (species):
Lemna minor
Test type:
not specified
Water media type:
freshwater
Total exposure duration:
14 d
Duration:
14 d
Dose descriptor:
EC50
Effect conc.:
> 10 - < 20 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
frond number
Duration:
14 d
Dose descriptor:
EC90
Effect conc.:
> 10 - < 20 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate

at 10 mg/dm3was reduction approx 60% in root length and reduction approx. 30% in leaf number,

at concentration of 20 mg/dm3reduction of root length and leaf number increased to 85% and 75% reduction of leaf number
Executive summary:

It is accepted that the parent substance will have hydrolysed in the course of the testing, but OECD Guidance Document on Aquatic Toxicity Testing of Difficult Substances and Mixtures (Guideline 23) was followed.


The method allows for pre-mixing hydrolytically unstable substances in water to mimic the release to the environment via waste-water systems.


Analysis for parent material not possible.

Description of key information

Key value for chemical safety assessment

EC50 for freshwater plants:
10 mg/L

Additional information