Registration Dossier
Registration Dossier
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EC number: 206-839-0 | CAS number: 381-73-7
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
According to QSAR prediction data , the 72 h value of difluoroacetic acid on Green algae is estimated to be NOEC: 106.73 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 106 mg/L
Additional information
No. of studies reviewed for short – term toxicity to aquatic algae and cyanobacteria 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 |
NOEC |
106.73 mg/L |
Growth |
72 hrs |
Pseudokirchneriella subcapitata |
Predicted data from QSAR |
2 |
LC50 |
4141.50 mg/L |
--- |
96 hrs |
Green Algae |
Predicted data from ECOSAR |
By applying weight of evidence approach to the test substance difluoroacetic acid, the endpoint value was found to NOEC = 106.73 mg/L at 72 Hrs & LC50 at 4141.50 mg/L in a 96 hrs. at 72 hrs. study on the basis of growth effect. The BCF value of difluoroacetic acid reported was not >= 500 as well as the substance was found to be rapidly degradable
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