Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.174 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
0.174 µg/L

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.012 mg/kg sediment dw

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
1.02 mg/kg soil dw
Assessment factor:
10
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

The aquatic toxicity was tested on all tropic levels and showed that fish are the most sensitive species with an 96h LC50 of 0.174 mg/L. Two chronic values are present; one from the algal assay of 11 mg/L and one from a Daphnia magna reproduction study, which gave the lowest EC10 on reproduction of 0.205 mg/L. 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene is biotically degradable however the criterion of >70% COD or 60% CO2 evolution was not reached within 28 days. The substance is abiotically degradable with a half-life of 68.5 hours at 25°C. The CLP regulation states (chapter 4.1.2.9.4) that hydrolysis can be considered if the hydrolysis products do not fulfill the criteria for being hazardous to the aquatic envirionment. However the hydrolyis products are unknown and therefore cannot be evaluated. The following classifications are applicable

1. H400: Based on the lowest acute value of 0.174 mg/L the substance is aquatic acute cat. 1

2. H411: Based on the lowest chronic value of 0.205 mg/L for degradable substances with unknown hydrolysis products, 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene is aquatic chronic cat. 2.