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: 923-908-7 | CAS number: -
The aim of this study was to determine the 72h-EC50 of Montanov 82 against Desmodesmus subspicatus according to OECD 201 resp. EU C.3. The incubation period of 72 hours corresponds to a subchronic test, as during this period, about five cell divisions take place. Selection of the test item was made following the proposal of the guidelines.
As the item is poorly soluble, the water-accomodated fraction was prepared for the test. This was done by weighing of each nominal load, adding the corresponding amount of deionised water and shaking vigorously for 24 hours. The resulting solutions were filtrated through 0.45 um filters.
In the main study, three concentrations of the test item in a geometric series (spaced by factor 10, the highest being 100mg/L) were used. The treatments were used to incubate the unicellular freshwater green alga Desmodesmus subspicatus for a period of 72 hours.
The cell concentration of each replicate was determined by measuring the absorption of cuvettes at 440 nm every 24 hours. with a spectral photometer. With these measured values, the number of cells was calculated (linear correlation between cell concentration and absorption given). Then growth rate, the area under the growth curve (AUC) and the yield could be determined.
The EC50s of potassium dichromate was tested in ac urrent reference test. The values lay within the normal range of the laboratory.
The following results for the test item were determined.
72 h NOEC ca. 100 mg/L
72 h LOEC > 100 mg/L
72 h EC50 > 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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Close Do not show this message again