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EC number: 200-929-3
CAS number: 76-05-1
Acute data of various reliability, some based on international
guidelines, are available for three trophic levels: Algae, Invertebrates
and Fish and are summarised in the table below. In aqueous solution, the
pH of the substance is naturally low and for testing on organisms either
the sodium salt (NaTFA) or pH adjustment were required.
Among all the species tested, an adverse effect (growth
inhibition) was found only for the algae Selenastrum capricornutum.
Six other freshwater algae, three marine algae and three freshwater
aquatic plants were tested and no toxicity was found on none of the
species at the highest concentrations tested (up to 2 g/L).
Three acute studies (one key and two supportives) and one chronic
study (reproduction test) are available on Daphnia magna to
assess the toxicity of TFA on invertebrates. No short term nor long term
toxicity was observed for Daphnia magna as all studies had an
EC50 (48h) greater than or equal to the highest concentration tested of
1000 mg/L and a chronic daphnid 21 d reproduction test performed up to a
maximal concentration of 25 mg/L of TFA. While this value is taken as
the NOEC for invertebrates it is not a true NOEC as no effect
concentration was statistically calculated.
Two acute studies (one key and one supportive) are available on Danio
rerio and no toxicity was observed at the highest concentrations
tested. Therefore, an LC50 (96h) > 999 mg/L TFA was derived for the fish.
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