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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

In the key-study an EC50-value for algae (growth rate) of 27.7 mg a.s./L and a NOEC of 0.95 mg a.s./L could be determined after 72 h of exposure. 
Nevertheless that endpoint is not used for PNEC-calculation as PNEC-values were calculated on the basis of a QSAR-model for chronic toxicity.

Key value for chemical safety assessment

Additional information

For AES (C12-18, 1-2.5EO) Na (CAS 68081-91-4) no acute test on algae is available. Thus, as a worst-case assumption, read-across is prepared to a study conducted with alcohol C12 -14 ethoxylated sulfated sodium salts. In that tests Scenedesmus subspicatus were exposed to different concentrations of alcohol ethoxysulfates C12 -14 (2EO) (CAS 68891 -38 -3; content of active substance in test material: 69.7% a-WAS) in a static system according to the guidelines OECD 201 and EG Guideline 92/69 C.1. The GLP-study resulted in an EC50 (72 h)-value for growth rate of 27 mg/L as a-WAS (corresponding to 27.7 mg a.s./L) (Scholz, Sasol, 1993) and is determined as key study.