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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

The test substance is with high probability not acutely harmful to aquatic  algae.

Key value for chemical safety assessment

Additional information

The effects of the test substance on algae were investigated in a GLP-study according to OECD guideline 201. Since the test item contains two different isomers, five WAFs (water accommodated fractions) with loading rates of 1.0, 3.2, 10, 32, and 100 mg/L were used. The test was performed under static conditions using Scenedesmus subspicatus as test species and the test concentration were analytically measured at the beginning and at the end of the test (sum of both isomers). The test item concentrations decreased during the test duration of 72 h. This decrease was considered to be due to photolytical degradation of the test item due to the intensive irradiation.

Based on growth rate an EC50 (72 h) > 100 mg/L loading rate (> 3 mg/L mean measured) was reported. Additionally, an NOEC (72 h) = 1 mg/L loading rate (= 0.53 mg/L mean measured) was determined (RCC Ltd., 2003).