Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.32 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
3.2 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.032 mg/L

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.166 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:
0.145 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Ethyl-(S)-lactate has a low potential for adsorption to sediment and soil, is readily biodegradable and is rapidly hydrolysed to lactic acid and ethanol in vivo. No adverse effects have been observed in the acute aquatic toxicity studies with fish, daphnids and algae at the highest recommended test concentrations of 100 mg/L. However, since test concentrations of > 100 mg/L were employed, adverse effects were observed at elevated concentrations. PNECs were hence calculated on the basis of the lowest observed EC/LC50 of 320 mg/L (fish, 96 h).

Ethyl-(S)-lactate proved to be non-toxic to STP microorganisms at concentrations up to the limit concentration of 1000 mg/L (NOEC). Therefore, no hazard to STP microorganisms has been identified and a PNEC(STP) cannot be determined.

Conclusion on classification

Ethyl-(S)-lactate has a low potential for adsorption to sediment and soil, is readily biodegradable and is rapidly hydrolysed to lactic acid and ethanol in vivo. No adverse effects have been observed in the acute aquatic toxicity studies with fish, daphnids and algae at the highest recommended test concentrations of 100 mg/L.

Therefore, ethyl-(S)-lactate is not classified for environmental hazards.