Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
10 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.74 µg/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:
0.191 µg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no data available: testing technically not feasible

Additional information

Conclusion on classification

The short-term toxicity test available performed with fish and algae and that were considered as valid (validity of 1) conclude on a toxic effect of 2-EHN and justify a classification (Pseudokirchnerella subcapitata: EC50 (72 h) < 0.8 mg/L based on average specific growth rate (ErC50) and < 0.8 mg/L based on yield (EyC50)).

The acute toxicity test conducted with Daphnia magnia is not used for the classification of 2-EHN. Indeed, this study have restriction due to the lack of analytical confirmation of dose concentration and as the aquatic invertebrate is not the most sensitive species for aquatic compartment, no other study has been conducted.

Furthermore, 2-EHN is not readily biodegradable and has a log Kow4 ; it is covered by the R 50/53 criterion set out in Annex VI to Directive 67/548/EEC. On the same rationale, classification Aquatic Chronic 1 – H410 is proposed according to CLP regulation.