Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Short term toxicity

No data is available for trimagnesium dicitrate, however, data for the parent compound, citric acid, is available.

The available data read-across from citric acid is sufficient to fulfil the information requirements for these endpoints. Information available in the public domain on tests carried out on other salts of this metal indicates that the magnesium counter-ions are not expected to contribute to the toxicity of the substance. Additionally, the substance will dissociate when in solution, so the test organisms will be exposed to the citrate and the metal ions separately. Therefore, the hazard assessment for this substance can be based on the properties of citric acid.

Reliable acute toxicity tests results are available for freshwater fish (Leuciscus idus), invertebrates (Daphnia magna) and algae (Scenedesmus quadricauda) with citric acid. LC50 or EC50 values for the first two organisms were 440, 1535 mg/L respectively. A TT of 640 mg/L was determined in the algal test from which a NOEC of 425 mg/L was derived. However the algal study should not be considered due to the essential nutrient complexing properties of the test substance that do not permit to assess the true toxicity of the test substance.

The citric acid data has been converted into trimagnesium dicitrate by a MW conversion factor, please see section specific Endpoint Summaries for further details. 

In accordance with Column 2 of REACH Annex VIII, the activated sludge respiration inhibition study (required in Section 9.1.4) does not need to be conducted as the substance is readily biodegradable and the applied test concentrations are in the range that can be expected in the influent to a sewage treatment plant.

Long term toxicity

In accordance with Column 2 of REACH Annex IX, the long-term aquatic toxicity to fish study (required in Section 9.1.6) does not need to be conducted as the chemical safety assessment according to Annex I indicates that this is not necessary.

In accordance with Column 2 of REACH Annex IX, the long-term aquatic toxicity to invertebrates study (required in Section 9.1.5) does not need to be conducted as the chemical safety assessment according to Annex I indicates that this is not necessary.