Registration Dossier
Registration Dossier
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EC number: 203-564-8 | CAS number: 108-24-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 3.058 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 30.58 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.306 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 115 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 11.36 mg/kg sediment dw
- Extrapolation method:
- sensitivity distribution
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 1.136 mg/kg sediment dw
- Extrapolation method:
- sensitivity distribution
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.47 mg/kg soil dw
- Extrapolation method:
- sensitivity distribution
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Acetic anhydride hydrolyses rapidly to acetic acid (half-life of 4.4 mins at 25°C), therefore read across of ecotoxicity data expressed based on concentrations of acetic acid is appropriate. PNECs were derived for freshwater, saltwater, sediment, and soil using either experimental results or equilibrium partitioning calculations. The PNECs derived using experimental data were based on Klimisch 1 or 2 studies.
Conclusion on classification
Acetic anhydride hydrolyses rapidly to acetic acid (half-life of 4.4 mins at 25°C),therefore read across of ecotoxicity data expressed based on concentrations of acetic acid is appropriate The lowest acute result, based on the acetate ion, was calculated to be >300.82 mg/L.These results indicate that, based on read across, acetic anhydride should not be assigned an acute or a long term classification..
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