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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

LC50 (48 h) 515 mg/L Leuciscus idus melanotus (r-a)

Key value for chemical safety assessment

LC50 for freshwater fish:
515 mg/L

Additional information

No reliable toxicity to freshwater fish data are available with trimagnesium dicitrate, CAS 3344-18-1. A reliable fish short term toxicity study is, however, available for the parent acid of trimagnesium dicitrate, citric acid (CAS 77-92-9). It is considered appropriate to read across the short term toxicity to fish results to trimagnesium dicitrate, 3344-18-1, because under conditions relevant to ecotoxicity assessment, the magnesium salt and citric acid are expected to be fully dissociated. Magnesium is not expected contribute to the toxicity of the substance, being a ubiquitous element.

The test reported (48 h) LC50 values corresponding to 440 mg/L and 760 mg/L determined in two laboratories conducting tests in parallel for the effects of citric acid, CAS 77-92-9 on mortality of the freshwater fish Leuciscus idus melanotus.

Calculations of the LC50 for trimagnesium dicitrate:

The lowest (48 h) LC50 for citric acid is 440 mg/L, which is equivalent to 440 * 1.17 = 515 mg/L of trimagnesium dicitrate 3344-18-1

using Mass of one mole of salt)/(mass of citric acid produced when the salts dissociates) = 451.1 / (2 * 192.9) = 1.17