Registration Dossier
Registration Dossier
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EC number: 421-140-2 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The test substance is not inhibitory to the bacterial inoculum.
NOEC >= 10 mgC/L = NOEC >= 17.7 mg RSS-4/L.
Key value for chemical safety assessment
Additional information
Only one study exists addressing the toxicity of RSS-4, dry substance towards microorganisms (1996, rated Klimish 2). This study is run as a preliminary study for the assessment of biodegradation potential. The test as such is not designed to fully investigate the toxicity of the test substance to microorganisms. However, it can still be considered relevant for this endpoint.
The 5-day bacterial inhibition assay was conducted as a closed bottle test to determine whether RSS-4, at a concentration of 10 mgC/L, inhibited the normal degradative activity of the bacterial inoculum on the reference material, sodium benzoate. Although an operational error prevented an assessment of the degradation of sodium benzoate in the presence of RSS-4, the high level of oxygen consumption in the mixtures containing RSS-4 alone at 10 mgC/L (2.7 mgO2/L; 7% of its ThOD), indicated that the material was not inhibitory to the bacterial inoculum.
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