Registration Dossier
Registration Dossier
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EC number: 208-031-3 | CAS number: 506-30-9
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The effective concentration (EC50) of Eicosanoic acid in the microorganism (Tetrahymena pyriformis) in a 24 hr study on the basis of population effect was estimated to be as 5.85 mg/L.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 5.85 mg/L
Additional information
No. of studies were reviewed for toxicity to microorganisms from reliable sources having Klimisch rating 2 and 4.
The summary of the results are presented below
Sr.No |
Endpoint |
Effect values |
Basis for effects |
Duration |
Species |
Sources |
1 |
EC50 |
5.85 mg/L |
Population |
24 hr. |
Tetrahymena pyriformis |
Predicted data from QSAR for target CAS : 506-30-9 |
2 |
EC50 |
75.387 mg/L |
- |
15 min. |
Vibrio fisheri |
Experimental data from Environmental Toxicology and Water Quality for RA CAS : 57-10-3 |
Based on the studies summarized in the above table for the target substance Eicosanoic acid and the read across substance, in microorganisms (Tetrahymena pyriformis and Vibrio fisheri),the endpoint value was found to vary between EC50 = 5.85 mg/L to 75.387 mg/L in a 15 min. to 24 hr. study on the basis of population effect.
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