Registration Dossier
Registration Dossier
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EC number: 219-323-5 | CAS number: 2414-98-4
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Magnesium ethanolate hydrolyses rapidly in contact with moisture or water (t1/2<1 minute) into ethanol and magnesium hydroxide.
Valid short-term toxicity data for invertebrates are available for the magnesium ethanolate and for the hydrolysis products ethanol and magnesium hydroxide.
Magnesium ethanolate
A valid acute toxicity test for daphnia magna according to OECD under GLP is available. The LC50 was 33 mg/l.
An influence on the effects resulting from pH chages especially at higher concentrations during the test can not be excluded.
Hydrolysis product ethanol
A large amount of data on the toxicity of ethanol is available for a broad spectrum of aquatic organisms. The results from the most reliable and relevant available studies to acute toxicity of invertebrates showed EC50 values above 10000 mg/l.
Hydrolysis product magnesium hydroxide:
The outcome of the studies showed that magnesium hydroxide has a low toxicity to aquatic invertebrates and algae. Magnesium sulphate and magnesium chloride, and hence the magnesium ion, all have a very low toxicity to aquatic organisms.
The studies for this endpoint concluded that the EC50s for invertebrates of magnesium hydroxide is above 100 mg/l.
Long-term toxicity is unlikely to occur based on the physico-chemical properties of magnesium hydroxide (low water solubility) and the breakdown pathway of the substance. Magnesium hydroxide is expected to break down in the environment to water and magnesium over time., Magnesium is ubiquitous in the environment and is an essential plant and animal nutrient.
All available data of ethanol and magnesium hydroxide demonstrated low acute toxicity to aquatic organisms. Magnesium ethanolate and ethanol are readily biodegradable substances and it can be concluded that no classification is required for magnesium ethanolate.
Key value for chemical safety assessment
Additional information
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