Registration Dossier
Registration Dossier
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EC number: 919-701-6 | CAS number: 503157-00-4
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The EC50 value in Pseudokirchneriella subcapitata was found to be 495.29 mg/L
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 495.29 mg/L
Additional information
The effect of FAT 40866/A TE was tested on the growth of fresh water single cell green algae Pseudokirchneriella subcapitata.
The alga was exposed to the test item at the nominal concentrations of 1, 3.2, 10.2, 32.8 and 100 mg/L (factor of 3.2) along with a negative control and a positive control. The cell growth was measured at 24, 48 and 72 hours after the initiation of the test.
The concentration / effect relationship was determined using two factors namely growth rate and yield. The inhibition of growth rate was 1.39, 3.76, 12.57, 20.14 and 26.04 % and the inhibition of yield was 5.98, 15.30, 42.62, 59.08 and 68.62 % at the tested concentrations of 1, 3.2, 10.2, 32.8 and 100 mg/L, respectively, when compared to the negative control. There was 31.32 % and 75.32 % inhibition of average growth rate and yield of alga, respectively, in the positive control.
The EC50 values calculated for growth rate (ErC50) was found to be 495.29 mg/L.
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