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Ecotoxicological information

Endpoint summary

Administrative data

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Additional information

Acute toxicity

The ecotoxicity risk assessment for the dilithium salts of dicarboxylic acids (C6-C10) category is all based on specific testing of algae, fish and invertebrates in OECD 202, 203 and 201 tests respectively for all three substances (Tobor-Kaplon 2015). None of the substances in the three dilithium salts of dicarboxylic acids (C6-C10) category are considered to be acutely toxic to fish or invertebrates as all of the substances have EC50s> 100 mg/L. There were some inhibitory effects of the substances on algae but for dilithium sebacate and dilithium azelate the ErC50’s based on growth rate were ≥ 100 mg/L. The most sensitive result is for dilithium adipate with an ErC50 was 23 mg/L.

Chronic toxicity

There is also data for chronic toxicity of the substances on algal growth inhibition. The NOEC’s based on growth rate were ≥ 100 mg/L for dilithium azelate, 10 mg/L for dilithium sebacate and 3.2 mg/L for dilithium adipate. REACH Chapter R5 (ECHA 2011) states that chronic aquatic ecotoxicity testing may be triggered if the CSA indicates that there is a need to investigate further the effects on the environment. Testing may be triggered if additional testing could alter the conclusions on classification, PBT assessment or the level of concern. The dilithium salts of dicarboxylic acids (C6-C10) are readily biodegradable, have low potential for bioaccumulation and show low acute toxicity >10 mg/L. Algae were the most sensitive species in the acute testing and chronic effects were also reported in the tests. Chronic toxicity based on NOECs for growth rate in OECD 201 tests for all three substances were >1 mg/L. Additional chronic toxicity tests would not be expected to change the classification or the conclusion that these substances are neither PBT nor vPvB. As the members of this category are not classified or considered to be PBT/vPvB, an exposure assessment is not required and no additional chronic testing is required to refine this assessment (ECHA R7b 2012).

Sediment toxicity

 

No data are available for the toxicity to sediment organisms. Sediment toxicity data is not a data requirement at the registered tonnage band.

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