Registration Dossier

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

EC50 (72 h) = 3.4 mg/l

Key value for chemical safety assessment

Additional information

In order to evaluate the algal toxicity endpoint a read-across approach was adopted: one study conducted on the Similar Substance 01 and two studies conducted on the Similar Substance 02 were considered.

The Similar Substance 01 was tested for acute toxicity on algae according to the OECD Guideline 201 (1984) and Royal Decree 363/1995 (BOE no. 133 of June 1995).

For determination of cell growth inhibition freshwater of Pseudokirchneriella subcapitata (formerly Selenastrum capricornutum) was used. The result obtained in this test indicates that the dye had an EC 50 value (72h) equal to 3.4 mg/l of active material (nominal).

Two tests are available on the Similar Substance 02 and were conducted according to EEC 79/831 Annex V. The EC50 (cell number) for the tested samples under the experimental conditions is extrapolated to 80.8 mg/l and 71.8 mg/l.