Registration Dossier
Registration Dossier
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EC number: 219-323-5 | CAS number: 2414-98-4
Short-term toxicity to fish
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 (detailed description in section 5.1.2). Ethanol and magnesium hydroxide are natural occuring substances. Valid short-term toxicity data for fish are available for magnesium ethanolate and its hydrolysis products ethanol and magnesium hydroxide.
Magnesium ethanolate was tested in a valid short term toxicity test to fish according to OECD 203 and GLP. The LC50 was determined at 422 mg/l, No effects were observed at 300mg/l test substance. An influence from pH changes on the effects especially at higher concentrations can not be excluded.
Hydrolysis product magnesium hydroxide:
Studies with magnesium hydroxide, magnesium ions and different magnesium salts were carried out on the short-term toxicity to fish. All studies showed low toxicity.
From the key studies, the recalculated LC50 (96h) of P. Promelas was determined to be 306.79 mg/L for freshwater fish.
According to the available data, the hydrolysis product magnesium hydroxide can be considered as not acutely harmful to fish.
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 to fish showed LC50 values above 10000 mg/l. According to the available data, the hydrolysis product ethanol can be considered as not acutely harmful to fish.
Long-term toxicity is unlikely as ethanol is readily biodegradable.
The test results with magnesium ethanolate and with both hydrolysis products showed that the parent and hydrolysis products are not dangerous for aquatic organisms and no classification is required.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 422 mg/L
Additional information
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