Registration Dossier
Registration Dossier
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EC number: 288-470-5 | CAS number: 85736-59-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.007 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.71 µg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.283 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.493 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.049 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:
- 0.103 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 8.87 mg/kg food
- Assessment factor:
- 300
Additional information
Conclusion on classification
The substance naphthenic acids, bismuth salts has a very low solubility in water, determined at 20 °C to be below the limit of quantification of the study (< 0.036 mg/L). Acute aquatic toxicity data with various bismuth compounds on three trophic levels (fish, invertebrates, algae) did not show signs of toxicity. The naphthenic acids also have been assessed on three trophic levels showing LC50/EC50 values of 5 - 50 mg/L, whereas the most critical species appeared to be fish with an LC50 (96 h) of 5.62 mg/L and a NOEC (96 h) of 3.22 mg/L. Naphthenic acids were shown to be inherently biodegradable. In conclusion, with effect on cations and anions only seen two orders of magnitude above water solubility and considering inherent biodegradability, the substance naphthenic acids, bismuth salts does not require classification for acute or chronic aquatic toxicity according to CLP (Regulation EC No 1272/2008).
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