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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The toxicity of Aromatic hydrocarbons, C10-13, reaction products with branched nonene, sulphonated, sodium salts to algae was tested according to OECD guideline 201. The ErC50 was observed to be >810 mg/L and the ErC10 was observed to be 135 mg/L

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
135 mg/L

Additional information

The definitive algae test has been performed with the high nonene naphthalene sulphonate (batch no S001218) because algae and daphnia range finding tests with both the low nonene (batch no S001235) 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.