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Registration Dossier
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EC number: 908-343-6 | CAS number: -
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.036 mg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.039 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.036 mg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 1.7 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.13 mg/kg sediment dw
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.13 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:
- 0.006 mg/kg soil dw
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
The PNECs for the reaction mass of calcium carbonate and calcium dihydroxide and calcium peroxide are based on the corresponding PNECs that are available for hydrogen peroxide, taking into account that:
a) according to the stoichiometry of the hydrolysis reaction of calcium peroxide, an equimolar amount of hydrogen peroxide is formed; and that
b) the reaction mass of calcium carbonate and calcium dihydroxide and calcium peroxide typically contains 75% of calcium peroxide.
PNEC fresh and marine water
PNEC FW (hydrogen peroxide): 0.0126 mg/L
PNEC SW (hydrogen peroxide): 0.0126 mg/L
a) stoichiometry
0.0126 mg hydrogen peroxide = 3.70E-07 mol hydrogen peroxide
= 3.70E-07 mol calcium peroxide
3.70E-07 mol calcium peroxide = 0.027 mg calcium peroxide
PNEC (calcium peroxide) = 0.027 mg/L
b) composition of reaction mass
PNEC (calcium peroxide) = 0.027 mg/L
PNEC (reaction mass) = 0.036 mg/L
The PNEC FW and PNEC SW for the reaction mass of calcium carbonate and calcium dihydroxide and calcium peroxide is 0.036 mg/L.
PNEC Intermittent release
PNEC IR (hydrogen peroxide): 0.0138 mg/L
a) stoichiometry
0.0126 mg hydrogen peroxide = 4.06E-07 mol hydrogen peroxide
= 4.06E-07 mol calcium peroxide
4.06E-07 mol calcium peroxide = 0.029 mg calcium peroxide
PNEC IR (calcium peroxide) = 0.029 mg/L
b) composition of reaction mass
PNEC IR (calcium peroxide) = 0.029 mg/L
PNEC IR (reaction mass) = 0.039 mg/L
The PNEC IR for the reaction mass of calcium carbonate and calcium dihydroxide and calcium peroxide is 0.039 mg/L.
PNEC STP
The PNEC for the STP can be derived from the valid STP study according to OECD Guideline No. 209 (Desmares-Koopmans, 2012). This study found a 3h-NOEC of 30 mg/L and a 3h-EC50 value of 170 mg/L.
The PNEC STP is calculated by applying a factor of 100 to the EC50 value, resulting in a PNEC STP of 1.7 mg/L.
PNEC fresh and marine water sediment
PNEC FW sediment (hydrogen peroxide): 0.047 mg/kg sediment dw
PNEC SW sediment (hydrogen peroxide): 0.047 mg/kd sediment dw
a) stoichiometry
0.047 mg hydrogen peroxide = 1.38E-06 mol hydrogen peroxide
= 1.38E-06 mol calcium peroxide
1.38 E-06 mol calcium peroxide = 0.100 mg calcium peroxide
PNEC (calcium peroxide) = 0.100 mg/kd sediment dw
b) composition of reaction mass
PNEC (calcium peroxide) = 0.100 mg/kd sediment dw
PNEC (reaction mass) = 0.133 mg/kd sediment dw
The PNEC FW sediment and PNEC SW sediment for the reaction mass of calcium carbonate and calcium dihydroxide and calcium peroxide is 0.13 mg/kd sediment dw.
PNEC soil
PNEC soil (hydrogen peroxide): 0.0023 mg/kg soil dw
a) stoichiometry
0.047 mg hydrogen peroxide = 6.76E-08 mol hydrogen peroxide
= 6.76E-08 mol calcium peroxide
6.76E-08 mol calcium peroxide = 0.0049 mg calcium peroxide
PNEC (calcium peroxide) = 0.0049 mg/kd soil dw
b) composition of reaction mass
PNEC (calcium peroxide) = 0.0049 mg/kd soil dw
PNEC (reaction mass) = 0.0065 mg/kd soil dw
The PNEC soil for the reaction mass of calcium carbonate and calcium dihydroxide and calcium peroxide is 0.0065 mg/kd soil dw.
Conclusion on classification
The available ecotoxicological information does not imply the classification of the reaction mass of calcium carbonate and calcium dihydroxide and calcium peroxide for environmental hazards.
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