Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
2.3 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
2.3 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
23 ng/L
Assessment factor:
1 000
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
22 mg/L
Assessment factor:
1
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.154 ng/kg sediment dw
Extrapolation method:
sensitivity distribution

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.002 ng/kg sediment dw
Extrapolation method:
sensitivity distribution

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
1.77 µg/kg soil dw
Extrapolation method:
sensitivity distribution

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

The PNEC for the aquatic compartment is based on the short-term LC50 in fish, which in this case is the most sensitive trophic level. The assessment factor is based on the fact that at least one short-term L(E)C50 is present from each of three trophic levels (fish, invertebrates and algae) an data from a reproduction test with Daphnia. The LC50 value for fish was even lower than the NOEC of the long-term test with Daphnia.

For the compartments: sediment and soil, the use of statistical extrapolation is preferred for further PNEC derivation rather than the use of an assessment factor on the lowest NOEC. These calculations are all based on the PNEC for the aquatic compartment, which makes this a key value for PNEC determinations.

Conclusion on classification

Classification is based on the fact that the 96 hr LC50 (for fish) ≤ 1 mg/l, which means that the substance is classified as Acute Category 1. The harmonized classification and labelling within the EU also indicates classification of DAP as category 1 for aquatic chronic toxicity. This classification can be disputed because, although not readily degradable, DAP degrades by more than 70% within four weeks and the experimentally determined BCF is well below 500 with a log Kow < 4.