Registration Dossier

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.023 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.23 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.002 mg/L
Assessment factor:
10 000

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

The available data from freshwater ecotoxicity studies on the three dilithium salts of dicarboxylic acids (C6-C10) (Tobor-Kaplon 2015) showed low acute toxicity >10 mg/L based on EC50’s. PNEC’s have been derived for freshwater, marine water and for intermittent releases based on the lowest reported EC50 of 23 mg/L for the effects on algae of dilithium adipate.

The dilithium salts of dicarboxylic acids (C6-C10) category show low toxicity, have vapour pressures of less than < 2.9 x 10-8 Pa at 25°C, are readily biodegradable and have low potential to bioaccumulate. The substances are not applied directly to soil and furthermore are used only in a grease matrix which limits their bioavailability (see Appendix 3). The STP, sediment, soil, secondary poisoning and air PNECs were not derived due to a lack of potential exposure or a lack of identified hazard.

Conclusion on classification

None of the dilithium salts of dicarboxylic acids (C6-C10) category showed acute toxicity to aquatic organisms with EC50s >10 mg/L. Therefore, they do not meet the criteria for classification as acutely toxic to the aquatic environment under the DSD or the CLP.

Chronic aquatic toxicity data for dilithium salts of dicarboxylic acids (C6 -C10) category are only available for algae. The chronic toxicity NOEC’s based on growth rate are all > 1 mg/L. These data would not result in a chronic classification under the CLP. All of the substances in the category are considered to be readily biodegradable, with a low potential for bioaccumulation.

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