Registration Dossier
Registration Dossier
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EC number: 205-487-5 | CAS number: 141-52-6
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The inhibition of the degradation activity of Pseudomonas putida is not anticipated when introduced in appropriate low concentrations.
Key value for chemical safety assessment
Additional information
Sodium ethanolate hydrolyses in water to form inorganic sodium hydroxide and ethanol. For sodium hydroxide no data are available since the substance completely dissociates in water and effects are related to a shift in pH values only. For the organic hydrolysis product a number of studies have been carried out to assess the toxicity of ethanol to micro-organism using multiple species of protozoa and bacteria in fresh water. These studies that are reliable indicate that the substance may be slightly toxic to micro-organisms. The weight of evidence suggested that the substance is generally of low toxicity. The 'standard' bacteria (P. putida) was around the middle of the toxicity results. Ciliated protozoa are acceptable as surrogates to predict the toxicity in a WWTP; Paramecium meet this criteria (but not Entosiphon). The Paramecium figure is therefore selected as the key parameter from which to predict the hazard to degradation of substances in waste water treatment plants.
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