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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

In the key study an EC50 for Daphnia magna of 0.14 mg/L. could be determined after 48 h of exposure.
Nevertheless that endpoint is not used for PNEC-calculation as PNEC-values were calculated on the basis of a HC5-approach.

Key value for chemical safety assessment

Additional information

For alcohol C12 -15 ethoxylates three reliable studies are avialable. In the GLP-study of Seaber (Croda, 1994) an EC50 of 0.23 mg/L (nominal; purity of test material: not stated) was determined for the alcohol ethoxylate mixture C12 - C15 with a degree of ethoxylation of 3 after 48 h of exposure. The test was conducted according to OECD 202. The second reliable test for alcohol C12 - C15 ethoxylates with 3EO is not conducted according to a recommended guideline but with a method comparable to current standards. In that non-GLP study an EC50-value of 0.14 mg/L is reported for daphnids after a 48 h test period. The third reliable test available is conducted with alcohol C12 -15 ethoxylates branched and linear (CAS 106232 -83 -1) according to OECD 202 (Consonni, Sasol, 2003). The test resulted in an EC50 -value > 2 mg/L after 48 h of exposure. The study of Stephenson (Shell, 1982) which reported an EC50 of 0.14 mg/L is determined as key study.

In addition to tests conducted on daphnids, a GLP-study is available for marine invertebrates. The study is conducted according to the PARACOM ring test protocol and reported an EC50 -value for Acartia tonsa of 0.88 mg/L (Bogers, Shell, 1993). This result is in line with the results given for daphnids.

In addition to the described data, three abstracts of studies are available which are not sufficient for evaluation as only short abstracts are available. Generally the EC50 -values mentioned in the abstracts are in line with the described endpoints given in the reliable studies and were thus listed as supporting data.