Lithium fluoride

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

5.05 mg/L

Assessment factor:

1

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

1.524 mg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.505 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

PNEC marine water (intermittent releases):

1.524 mg/L

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

85.78 mg/L

Assessment factor:

1

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

25.05 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

2.505 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:

2.06 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

PNEC freshwater sediment:
K_(susp-water) = 1.24 m³/m³
RHO_(susp) = 1150
Conversion factor (wwt -> dwt): 4.6

PNEC_freshwater sediment = (K_(susp-water)/RHO_(susp))*PNEC_water*1000
= (1.24/1150) * 5.05 * 1000
= 5.45 mg/kg wwt
= 25.05 mg/kg dwt

The PNEC (sediment-freshwater) of dry weight (dwt) of lithium fluoride is 25.05 mg/kg corresponding to the wet weight (wwt) value of 5.45 mg/kg (conversion factor: 4.6).

PNEC marine water sediment:
K_(susp-water) = 1.24
RHO_(susp) = 1150
Conversion factor (wwt -> dwt): 4.6

PNEC_freshwater sediment = (K_(susp-water)/RHO_(susp))*PNEC_water*1000
= (1.24/1150) * 0.505 * 1000
= 0.545 mg/kg wwt
= 2.505 mg/kg dwt

The PNEC (sediment-marine) of dry weight (dwt) of lithium fluoride is 2.505 mg/kg corresponding to the wet weight (wwt) value of 0.545 mg/kg (conversion factor: 4.6).

PNEC soil:
K_(soil-water) = 0.614 m³/m³
RHO_(soil) = 1700
Conversion factor (wwt -> dwt): 1.13

PNEC_soil = (K_(soil-water)/RHO_(soil))*PNEC_water*1000

= (0.614/1700)*5.05*1000

= 1.82 mg/kg wwt

= 2.06 mg/kg dwt

The PNEC (soil) of dry weight (dwt) of lithium fluoride is 2.06 mg/kg corresponding to the wet weight (wwt) value of 1.82 mg/kg (conversion factor: 1.13).

Conclusion on classification

Data based on read-across from, LiCl, NaF, LiOH*H2O

Short term toxicity: Fish LC50 = 96.69 mg/L (read-across from LiCl)

Long term toxicity: Fish NOEC = 10.73 mg/L (read-across from LiOH*H₂O)

Short term toxicity: Invertebrates EC50 = 132.44 mg/L (read-across from NaF)

Long term toxicity: Invertebrates NOEC = 5.05 mg/L (read-across from NaF)

Short toxicity: Algae EC50 = 58.71 mg /L (read-across from NaF)

Long term toxicity: Algae NOEC = 15.3 mg/L (read-across from LiCl)

 

Classification according to CLP

The available read-across test data are reliable and suitable for classification purposes under Regulation (EC) No 1272/2008. The test substance is inorganic, thus biodegradation study was technically not possible. In all aquatic tests, the test item showed no toxic effect on the tested species. Based on the available data, lithium fluoride has not to be classified according to Regulation (EC) No 1272/2008 (CLP) criteria as the acute (LC50/ ErC50) and chronic toxicity (ECx/ NOEC) values are > 1 mg/L, as amended for the fifteenth time in Commission Regulation (EU) 2020/1182.