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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

EC50 72 h algae = 7.8 mg/L

EC10 72 h algae = 1.5 mg/L

Key value for chemical safety assessment

Additional information

The substance was tested for aquatic algae toxicity on Pseudokirchneriella subcapitata (formerly Selenastrum capricornutum) following OECD 201 (1984) and Royal Decree 363/1995 (BOE. 133 June 1995).

The result obtained indicates an EC 50 at 72h of 7.8 mg/L and EC10 estrapolated of 1.5 mg/l. However, considering that the test substance is a dyestuff which could influence the photosynthesis capacity of algae cells in the test solution and in order to clarify the (eco)toxicological properties related to toxicity for aquatic plants, it was considered a test performed on a structural analogue and conducted using the Lemna minor as a test organism, according to the OECD guideline 221, as suggested also in the Guidance on Information Requirements and Chemical Safety Assessment Chapter R.7b: Endpoint specific guidance (Version 2.0 November 2014), published by the European Chemical Agency.