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EC number: -
CAS number: -
Table1 Mean cell densities (x 104cells/ml)
% of filtrate
prep. at 100 mg/l
Exposure time (hours)
() – between brackets TWA concentration is given [ng/l]
Table2 Percentage reduction of growth rate (total test period) and percentage inhibition of yield
Mean growth rate
Yield (0-72 h)
µ (0-72 h)
Table3 Percentage reduction of growth rate at different time intervals
µ (0-24 h)
µ (24-48 h)
µ (48-72 h)
The toxicity to aquatic algae and cyanobacteria of FAT 41043/A was investigated according to OECD Guideline Nr. 201, EU Method C.3 and GLP principles. No reduction of growth rate was recorded at any of the concentrations of FAT 41043/A tested. The EC50 for growth rate reduction (ERC50: 0-72h) was beyond the range tested, i.e. exceeded a TWA concentration of 21 ng/l obtained in an undiluted filtrate prepared at a loading rate of 100 mg/l. The NOEC for growth rate reduction was 21 ng/l.
Due to the very low solubility of FAT 41043/A in water, concentration levels that might be toxic for algae could not be reached.
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