Registration Dossier

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Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.24 mg/L
Assessment factor:
100
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
0.24 mg/L

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
insufficient hazard data available (further information necessary)

Sediment (marine water)

Hazard assessment conclusion:
insufficient hazard data available (further information necessary)

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
817.4 mg/kg soil dw
Assessment factor:
1
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Based on read-across to available data on calcium dihydroxide:

96-h LC50 for fish (Oncorhynchus mykiss) = 50.6 mg/L.

48-h EC50 for invertebrates (daphnia magna) = 49.1 mg/L.

14d-NOEC for marine invertebrates (Crangon septemspinosa) = 32 mg/L

72-h ErC50 for algae (Pseudokirchneriella subcapitata) = 184.57 mg/L, NOEC = 48 mg/L.

On the basis of the acute toxicity data, classification for acute aquatic toxicity is not required. Chronic data are available for both invertebrates and algae. These values are above the classification limits for chronic toxicity, hence classification is not required.

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