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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

Tartaric acid and its salts are not expected to be toxic to microorganisms.

Key value for chemical safety assessment

Additional information

A IGC50 value higher than 1000 mg/L was predicted for tartaric acid by a valid QSAR model. As a supplement to it, no toxic effect to (sludge) microorganism was observed in the biodegradation tests on tartaric acid and disodium tartrate.

Based on the assumption that in dilute aqueous conditions of defined pH, a salt will be fully dissociated and will behave no differently to the parent acid at identical concentration of the particular speciated form present, the aquatic toxicity of tartaric acid salts (i.e. monosodium, monopotassium, sodium potassium, sodium, potassium and calcium tartrate) may be assessed using data specific for tartaric acid. Therefore, also the tartaric acid salts are deemed to be non-toxic to aquatic microorganisms.