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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

The 21d-EC10 Daphnia magna was 6.9 mg /L in a OECD TG 211 Daphnia magna reproduction test under GLP (Reliability 1) based on active ingredient concentration. 

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
6.9 mg/L

Additional information

The toxicity of Aromatic hydrocarbons, C10-13, reaction products with branched nonene, sulphonated, sodium salts to Daphnia magna was tested according to OECD TG 211 Daphnia magna reproduction test. Parental weight was the most sensitive parameter. EC10 for parental weight was reported to be 13.1 mg/L in the 21 day test under GLP conditions. This value equals to 6.9 mg/l based on the active ingredient concentration. The definitive daphnia test has been performed with the high nonene naphthalene sulphonate because algae and daphnia range finding tests with both the low nonene and high nonene substance indicated a slightly higher toxicity for the high nonene naphthalene sulphonate.

As the results of both range finding tests are considered to be valid and because both test substances are very similar in their fate during these tests, the conclusion that the high nonene derivative is slightly more toxic than the low nonene derivative is considered sufficient to select the more toxic derivative as the worst-case representative in the hazard assessment of both substances. For this reason read-across of ecotoxicity results of the source chemical (the high nonene derivative) to the target chemical (the low nonene derivative) is considered to be justified without the introduction of an additional safety factor.