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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

Alga

The toxicity of the test itemto the unicellular freshwater green algaDesmodesmus subspicatuswas determined according to the principles of OECD 201 (2011).The aim of the study was to assess the effects on growth rate and yield over a period of 72 hours.

Asaturated solutionwith a nominal concentration of 1 mg/Lwas tested.Sixreplicates were tested for the limit concentration and the control.Environmental conditionswere determined to be within the acceptable limits.

No analytical determination was carried out since no suitable method for the determination of the test item could be established. All effect values of the test itemare given based on the nominal concentration.

In this study, the NOEC-values of the test item for inhibition of growth rate and inhibition of yield after 72 hours were 1.00 mg/L and < 1.00 mg/L, respectively. The EC50-values of the test item for inhibition of growth rate (ErC50) and yield (EyC50) after 72 hours were both > 1.00 mg/L, respectively.

Daphnia

In the acute immobilisation test with Daphnia magna (STRAUS), the effects of the saturated solution* with a nominal loading of 1.00 mg/L of the test item were determined according to OECD 202 (2004). The limit test was conducted under static conditions over a period of 48 hours.

The test item is a red powder and sparingly soluble in water (< 0.02 mg/L at 20 °C). Therefore, a saturated solution was prepared by stirring with approximately 1100 rpm for 48 h at room temperature followed by filtration) to achieve the saturated solution.

No analytical monitoring was performed during the test because the test item has a very low solubility in water and organic solvents. Therefore, an analytical standard method with a sufficient sensitivity could not be established. Exposures are expressed in terms of the original concentration of the test item in water at the start of the mixing period (loading rate). 

Water quality parameters (i.e. pH-value and dissolved oxygen concentration), measured at the start (0 h) and at the end of the exposure (48 h), were within the acceptable limits. The validity criteria of the test guidelines were fulfilled.

 

At the saturated solution with a nominal loading of1.00 mg/L of the test item, no effects were observed on Daphnia magna.

 

Fish

The substance was tested for acute toxicity to the zebra fish according to OECD 203 guideline 203 over 96 hours in a static system.

Before insertion of the test organism the test concentration was stirred for 24 hours to ensure that the limit of solubility of the test substance in water was reached. The tested concentration showed a red turbidity. Particulate matters were observed on the water surface and the bottom of the test vessels.

The lethality values given are based on nominal concentrations.

The fish of the 100 mg/L group showed no effect in comparison with the negative control. In the control group no lethality was observed.

No lethality occurred up to the solubility limit of the test substance in the test water.

The LC50 value are therefore determined as > 100 mg/L.