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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 72 hour NOErL is 20.7 mg/l WAF and ErL50 is 75.6 mg/l WAF.

Key value for chemical safety assessment

Additional information

A single proprietary study on one stream from this category (68476 -55 -1) was available (Huntingdon Life Sciences, 2004). Pseudokirchnerella subcapitata were tested following guideline OECD 201. The algae were exposed to the test substance at five concentrations in a closed static test system with no headspace to maintain the exposure concentrations. The 72 hour ErL50 was reported as 75.6 mg/l WAF and the 72 hour NOErL as 20.7mg/l WAF. This data has been read across to all category members.

To support this study, a QSAR was used to calculate the expected toxicity of eleven representative components of the streams in the category. The calculated acute effect concentrations for invertebrates were 2.8 -9.4 mg/l. These values have been used in the PBT assessment of this category.