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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Reaction mass of Cuprate(4-), [4,5-dihydro-4-[[8-hydroxy-7-[[2-hydroxy-5-methoxy-4-[[2-(sulfooxy)Vinyl]phenyl]azo]-6-sulfo-2-naphthalenyl]azo]-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylato(6-)], trisodium salt and Cuprate(4-), [4,5-dihydro-4-[[8-hydroxy-7-[[2-hydroxy-5-methoxy-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-sulfo-2-naphthalenyl]azo]-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylato(6-)]-, sodium and Cuprate(4-), [4,5-dihydro-4-[[8-hydroxy-7-[[2-hydroxy-5-methoxy-4-[2-(sulfooxy)Ethanol]phenyl]azo]-6-sulfo-2-naphthalenyl]azo]-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylato(6-)], trisodium salt
EC number: 941-883-0 | CAS number: -
Toxicity to aquatic plants other than algae
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.
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.
