Registration Dossier
Registration Dossier
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EC number: 948-047-4 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The toxicity of the read across substance, fatty acids, C16-18, esters with ethylene glycol, was assessed for the algal species Desmodesmus subspicatus (previous name: Scenedesmus subspicatus). Over the 72 hour time frame there was a positive effect on the growth of the cells compared to the control. Based on this the 72 hour EC50 of the substance is considered >100mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
Additional information
The toxicity of fatty acids, C16-18, esters with ethylene glycol (CAS 91031-31-1) was investigated according to DIN 38412-9 under GLP conditions (Stelter, 1994). The green algae Scenedesmus subspicatus was exposed to nominal concentrations of 10 and 100 mg/L without a further filtration step. No inhibition of growth of S. subspicatus up to the limit of water solubility was observed resulting in an EC50 > 100 mg/L. An EC10 of 34 mg/L was determined since growth stimulation was observed in both concentrations used in this study. No inhibition of growth was observed. It can be concluded that fatty acids, C16-18, esters with ethylene glycol will not exhibit effects to aquatic algae up to the limit of water solubility.
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