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Long-term toxicity to aquatic invertebrates

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Description of key information

No long-term toxicity test with aquatic invertebrates is available, but no long-term effects can be expected.

Key value for chemical safety assessment

Additional information

There is no long-term test on aquatic invertebrates available for Fatty acids, C18-unsaturated, trimers (CAS No. 68937-90-6).

However, data on the chronic toxicity to fish does exist for the structurally similar category member Fatty acids, C18-unsaturated, dimers, hydrogenated (CAS No. 68783-41-5). During the 28-day long-term toxicity study with the freshwater fish Danio rerio according to ISO/DIS 10229-1 no effects on the average fish weight at the concentrations tested (0.2 and 1.0 mg/L nominal) was observed and a NOEC of ≥ 0.85 mg/L (mean measured) was determined (Marshall, 1994). As the water solubility of the test substance was determined to be < 0.52 mg/L no effect within the water solubility occurred.

As there was no sign that invertebrates are more sensitive than fish in short term tests, it cannot be expected that a long-term test with aquatic invertebrates will generate different results than the existing long-term test with fish.

Thus, a long-term study on aquatic invertebrates is not required.