Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.141 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.014 mg/L
Assessment factor:
10 000

STP

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

Sediment (freshwater)

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

Sediment (marine water)

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

Hazard for air

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.026 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Aquatic compartment PNECs are derived from LC50 value for Daphnia (EC50 is 141mg/L) which is the lowest short-term result from representatives of three taxonomic groups (fish, crustaceans, algae).

PNEC sed and PNEC soil were calculated from equilibrium partitioning. The followed equation for freshwater and marine compartment was used: (0.783 +0.0217xKoc)xPNEC water and for calculation of the PNEC soil: (0.174 +0.0104xKoc)xPNEC water.

The PNEC STP was calculated using EC50 value for Pseudomonas and assesment factor 10 was used for PNEC derivation.

Furthermore taking into account the solubility of the substance is not expected to distribute in sediments and/or soils but in aquatic compartment.

Conclusion on classification

Sodium diacetate is not classified as dangerous or harmful to the environment.