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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 growth of the green algae Pseudokirchneriella subcapitataexposed to the test item, 4407/DELIP HIBISCUS SEED, was investigated during a 72-hour exposure test according to OECD 201. The definitive test was performed with the filtrate of the test item loading rates of 1000, 312.5, 97.7, 30.5, 9.5 and 3.0mg/L plus the control. Three replicates were used for each filtrate of the test item loading rate and six for the control.

The endpoint valuesdetermined based on the nominaltest item loading ratesare given below:

The ErLR50/72 h value is 262.2 mg/L (95% confidence interval: 242.0 – 284.8).

The EyLR50/72 h value is 25.2 mg/L (95% confidence interval: 22.6 – 28.1).

Key value for chemical safety assessment

EC50 for freshwater algae:
262 mg/L
EC10 or NOEC for freshwater algae:
25.2 mg/L

Additional information