Registration Dossier

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

The aquatic toxicity of the test item cesium tetrafluoroaluminate was tested in a short-term toxicity test on fish. Since no other aquatic toxicity tests are available for cesium tetrafluoroaluminate, the results from the structural analogue cesium fluoro aluminate complex are used instead. The tests were conducted under GLP and followed OECD TG 201, 202 and 203, respectively.

Daphnids and algae were most sensitive with an EC50 after 48h or 72h, resp. of 31 mg/L. The LC50 after 96h in fish was 40.1 mg/L. The effect of the test item on the respiration of activated sewage sludge was assessed in a valid GLP study performed according to OECD TG 209. The EC50 value observed after 30 minutes exposure was greater than 100 mg/L. No long-term aquatic toxicity tests are available. No information on sediment toxicity and terrestrial toxicity is available.

Conclusion on classification

For inorganic compounds, biotic degradation in the environment is an irrelevant process but abiotic dissociation and subsequent interactions occur instead. Nonetheless, for classification purposes, inorganic substances are to be considered as non-rapidly degradable. Ecotoxicity data for three trophic levels (fish, invertebrates and alga) are available from cesium tetrafluoroaluminate or from its structural analogue cesium fluoro aluminate complex. From these data a critical effect value for classification of 31 mg/L was derived (Daphnia 48h-EC50 and Algae 72h-EC50). According to Regulation (EC) No. 1272/2008 for the Classification, Labelling and Packaging of Substances and Mixtures (CLP), cesium tetrafluoroaluminate is to be classified as harmful to the aquatic environment category Chronic 3; H412 (Harmful to aquatic life with long lasting effects). According to Directive 67/548/EEC for the Classification, Packaging and Labelling of Dangerous Substances, the substance is to be classified as R52/53 (Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment).