Registration Dossier

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.042 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:
0.007 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
0.02 g/kg food
Assessment factor:
90

Additional information

Based on the ECHA draft decision the PNEC freshwater, marine water, sediment fresh water and sediment marine water were calculated based on the acute data of tBA itself using the high assessment factors. Nevertheless the resulting PNEC values are very comparable by using as basis the acrylate category and the appropriate lower assessment factors. This also indicates a very homogenous behaviour of the acrylates in the environment. PNECs based on the acrylate category: Freshwater: 0.00272 mg/L; Marine water: 0.000272 mg/L; Sediment freshwater: 0.0169 mg/kg sediment dw; Sediment marine water: 0.00169, since the ecotoxicity profile of the acrylates is very similar.

Conclusion on classification

Short-term aquatic toxicity data are available for three trophic levels (fish, aquatic invertebrates, and algae). The lowest observed acute effect concentration is a 96-h LC50 value of 2.37 mg/L as derived from a study with fish (Leuciscus idus). Long-term aquatic toxicity data are available from read-across substances ethyl acrylate and n-butyl acrylate from studies with daphnids in which 21-d NOEC values of 0.19 and 0.136 mg/L were derived, respectively. The substance is qualified as not readily biodegradable. The log Kow value is determined at <4 (no experimentally determined BCF value is available). Based on all this information, the substance needs to be classified as Aquatic Acute Category 2, H401 (Toxic to aquatic life) and Aquatic Chronic Category 2, H411 (Toxic to aquatic life with long lasting effects).

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