Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.56 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
2.37 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.056 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
83.2 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
2.36 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.236 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
4.7 µg/kg soil dw
Assessment factor:
1 000
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

In aqueous solution, the pH of the substance is naturally low (pH<4) and for testing on organisms either the sodium salt (NaTFA) or pH adjustment were required.

Conclusion on classification

Environmental official classification according to Annex VI of Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008: Trifluoroacetic acid is reported under the Index No 607-091-00-1 and is classified as Aquatic Chronic 3, H412.

This official classification is conservative because, based on the key studies available, the substance should not be classified for the environment as explained below :

Short-term E/LC50 values are available for algae (key study growth rate 72hEC50 = 237 mg/L), daphnia (48hEC50 > 100 mg/L) and fish (96hLC50 > 100 mg/L). All of the key studies demonstrate E/LC50 above 100 mg/L, showing that the substance does not need to be classified for acute toxicity to aquatic organisms according to the CLP and the UN-GHS criteria.

Additionally, trifluoroacetic acid is not readily biodegradable and due to the log Kow < 4 there is no tendency to bioaccumulate. Chronic toxicity data are available for algae showing a 72hErC10 of 5.6 mg/L and for daphnia showing a 21dNOEC above 25 mg/L. Therefore, the substance does not need to be classified for chronic toxicity to aquatic organisms according to the CLP and UN-GHS criteria.