Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 274-700-1 | CAS number: 70616-89-6
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
Based on the findings of the study, exposure of Lemna minor to the test item based on nominal concentrations gave the following results: EC50 and NOEC (Frond number/growth rate) >100 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater plants:
- 100 mg/L
- EC10 or NOEC for freshwater plants:
- 100 mg/L
Additional information
A study was performed to assess the effect of the test item on the growth of the freshwater plant Lemna minor. The method followed that described in the OECD Guideline No. 221 “Lemna sp. Growth Inhibition Test (March 2006)”. Following a preliminary range-finding test, Lemna minor was exposed to an aqueous solution of the test item at a nominal concentration of 100 mg/L (six replicate flasks for a period of 7 days, under constant illumination at a temperature of 24 ± 1 °C. The number of fronds in each control and treatment group was recorded on days 0, 3, 5 and 7 along with observations on plant development. Chemical analysis of the test preparations on Day 0 (fresh media) and Day 7 (old media) showed measured test concentrations to range from 99 % to 102 % of nominal and so the results are based on nominal test concentrations only. Based on the findings of the study, exposure of Lemna minor to the test item based on nominal concentrations gave the following results: EC50 and NOEC (Frond number/growth rate) >100 mg/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
