Registration Dossier
Registration Dossier
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EC number: 939-689-6 | CAS number: -
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Acutely harmful to aquatic invertebrates.
Key value for chemical safety assessment
Additional information
Reaction mass of bis(2-hydroxyethanaminium) sulfite and 2-(methylamino)ethanol - oxosulfane oxide (1:1)is soluble in water and dissociates to 2 -(methylamino)ethanol, (2- hydroxyethyl)ammonium and sulphite ions.
Since no studies on the aquatic toxicity of the substance are available, study reports and published literature about the toxic effects of 2-aminoethanol, 2 -(methylamino)ethanol and substances of the sulphite category have been consulted alternatively.The EC50 values for 48-hour exposure of 2-aminoethanol (CAS 141-43-5) range from 32.6 mg/l to 97 mg/l for Daphnia magna (Huels AG 1997, NITE 1996 and Union Carbide Corporation 1988).
Additionally, a study with the test substance compound 2-(methylamino)ethanol (CAS 109-83-1) is available which was conducted according to EU Method C.2 with the test organism Daphnia magna [BASF AG 1993]. At test termination after 48 hours an EC50 of 33 mg/L (measured) was determined.
The guideline study on the acute toxicity of disodium disulphite (CAS 7681-57-4) and Daphnia magna resulted in an EC50 of 74.9 mg/L (nominal, SO3) after 48 h of exposure. According to the authors, observed effects were related to oxygen depletion as a result of the oxidation of sulphite.
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