α,α,α-trifluoro-4-nitro-m-cresol

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.54 µg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

5.4 µg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.054 µg/L

Assessment factor:

100

Extrapolation method:

assessment factor

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

1 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

0.044 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.004 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:

0.009 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

PNEC sediment

 

K_susp-water: 20.4 (according to EUSES)

RHO_susp: 1150 kg/m³(according to the CSA Guidance document equation R10-2)

PNEC_{sediment-freshwater}= (K_susp-water/RHO_susp) * PNEC_freshwater*1000

PNEC_{sediment-freshwater}= (20.4/1150) * 0.00054 mg/L * 1000

PNEC_{sediment-freshwater}= 0.00958 mg/kg wwt

PNEC_{sediment-freshwater}= 0.0441 mg/kg dwt (factor 4.6)

 

PNEC_{sediment-marine water}= (K_susp-water/RHO_susp) * PNEC_marine-water*1000

PNEC_{sediment-marine water}= (20.4/1150) * 0.000054 mg/L * 1000

PNEC_{sediment-marine water}= 0.000958 mg/kg wwt. 

PNEC_{sediment-marine water}= 0.00441 mg/kg dwt (factor 4.6)

PNEC soil 

K_soil-water: 23.6 (according to EUSES v. 2.1.2)

RHO_soil: 1700 kg/m³(according to the CSA Guidance document, chapter R.10, May 2008, equation R10-5)

PNEC_soil= (K_soil-water/RHO_soil) * PNEC_freshwater*1000

PNEC_soil= (23.6/1700) * 0.00054 mg/L * 1000

PNEC_soil= 0.0075 mg/kg wwt

PNEC_soil= 0.0085 mg/kg soil dwt (factor 1.13)

Conclusion on classification

Fish (Channel catfish): LC50 (96 hours): 0.632 mg/L

Daphnia: Chironomus tentans: LC50 (96 hours): 0.534 mg/L

Algae (Nitzschia sp.): EC50 (96 h): 1.2 mg/L

Microorganisms: EC50 value (3h): 48.6 mg/L (95% confidence limits: 42.2–56.3 mg/L). NOEC: 10.24 mg/L.

The test item is regarded as not biodegradable.

Classification according to CLP

Based on the data above, the substance has to be classified for short-term (acute) and long-term (chronic) aquatic toxicity according to Regulation (EC) No 1272/2008 (CLP), as amended for the tenth time in Regulation (EU) No 2017/776. For short-term (acute) aquatic toxicity the test item is classified as Cat 1 (H400: Very toxic to aquatic life, M-factor 1), for long-term (chronic) aquatic toxicity as Cat 1 (H410: Very toxic to aquatic life with long lasting effects, M-factor 1).