Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.14 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
1.4 µg/L

Marine water

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

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
1.85 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:
0.485 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Classification

Cerium ammonium nitrate is not considered to be biodegradable due to its inorganic nature. Furthermore, the substance is not considered to be bioaccumulative. Short-term toxicity tests performed with fish and daphnids showed that the substance is very toxic to fish (96-h LC50 = 0.53 mg (NH4)2Ce(NO3)6/L) and not toxic to daphnids (48-h EC50 > 100 mg (NH4)2Ce(NO3)6/L). The result for algae (72-h ErC50 = 93 mg (NH4)2Ce(NO3)6/L) is not taken into account because the observed effect on growth is considered to be a secondary effect (phosphate deprivation). Taking into consideration the acute test results for fish and daphnids and in accordance with the criteria for classification as defined in Annex I, Regulation (EC) No. 1272/2008, the test material is classified as follows:

Aquatic acute 1 (H400) - M-factor 1

Aquatic chronic 1 (H410) - M-factor 1