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EC number: 939-689-6 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Acutely toxic to aquatic algae.
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.There are two studies available on the toxicity of 2-aminoethanol (CAS 141-43-5) to aquatic algae (Scenedesmus subspicatus and Selenastrum capricornutum) with EC50 values from 2.8 - 22 mg/L (growth rate) [NITE, 1996; Huels AG, 1997]. Corresponding NOECs were determined to be in the range of 1 to 4 mg/L.
The acute toxicity of 2 -(methylamino)ethanol (CAS 109-83-1) to the green algae Scenedesmus subspicatus was examined in a guideline study according to EU Method C.3 [BASF AG, 1993]. At test termination after 72 hours, a measured EC50 = 28.1 mg/L and a measured NOEC of 3.13 mg/L were determined.
BASF (1989) investigated the effects of sodium metabisulfite (CAS 7681-57-4) on the growth rate of the green algae Scenedesmus subspicatus in a guideline study according to OECD 201. A 96h-study was conducted, and the derived effects levels after a 72h-exposure period were considered for assessment purposes. The EC50 and EC10 values were 43.8 and 33.3 mg test item /L, which corresponds to 36.8 and 28.0 mg SO32-/L, respectively.
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