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: 826-490-3 | CAS number: 1971906-58-7
In test item solutions, the algal growth rate (r) after 72 hours of exposure was inhibited by a minimum value of 2.5 % for the concentration 0.03 mg test item/L to a maximum value of 34.9 % for the highest tested concentration, 1.0 mg test item/L, compared to the solvent control.
A significant biological effect was shown from test item nominal concentration 0.10 mg/L in comparison to the solvent control for end-point growth rate after 72 hours.
The percentage of growth inhibition for the tested concentrations is reported in Table 6.
Table6 Algal growth rate and inhibition caused by the test item over 72 hours of exposure.
Nominal test item
Mean growth rate
*Growth valuewasslightly higher than the negative control
The ErC10, the ErC20and the ErC50values, the NOEC and LOEC values,in terms of nominal test item concentrations, for growth rate end-point, are reported in the following table:
0 - 24
(N/A – 0.133)
(N/A – 0.54)
0 - 48
(0.24 – 0.59)
(0.49 – 0.76)
(1.00 – 1.22)
0 - 72
(0.22 – 0.39)
(0.49 – 0.66)
(1.33 – 2.02)
*Effective concentration calculated by Statistical Software greater than the highest tested concentration (1.0 mg/L)
After 72 hours of exposure, the yield (Y), as difference of algal density between the end and the beginning of the test, was inhibited by a minimum value of 13.9 % for the concentration of 0.03 mg test item/L to a maximum value of 86.8% for the highest test item concentration of 1.0 mg/L, compared to the solvent control.
Until the 0.03 mg/L test item concentration no significant biological effect was shown in comparison to the solvent control for end-point yield.
The percentage of inhibition in terms of biomass for the tested concentrations is reported in Table 7.
Table7 Algal yield inhibition caused by the test item over 72 hours of exposure.
Mean yield at 72h
Mean yield inhibition
0.0 (negative control)
0.0 (solvent control)
* Biomass value higher than the negative control or solvent control.
The EyC10, the EyC20and the EyC50valueswith confidence limits (LCL, Lower Confidence Level and UCL, Upper Confidence Level), the NOEC and LOEC valuesat 72 hours, in terms of nominal test item concentrations, for yield end-point, are reported below:
(0.02 – 0.10)
(0.07 – 0.17)
(0.25 – 0.43)
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