Registration Dossier
Registration Dossier
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EC number: 217-699-5 | CAS number: 1934-21-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.12 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 1.2 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.012 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 10 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.47 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.047 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:
- 0.024 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
PNEC sediment using Equilibrium Partitioning Method:
The following formula is applied:
PNECsed= Ksusp-water p*PNECwater*1000/RHOsus
Where:
PNECwater |
Predicted No Effect Concentration in water |
[mg.l-1] |
0.12 |
RHOsusp |
bulk density of wet suspended matter |
[kg.m-3] |
1150 |
Ksusp water |
partition coefficient suspended matter water |
[m3.m-3] |
0.979 |
PNECsed |
Predicted No Effect Concentration in sediment |
[mg.kg-1of wet sediment] |
0.1021 |
Dry weight: 0.1021 * 4.6 = 0.46992
Ksusp water= Fwatersusp+ Fsolidsusp*Kpsusp/1000*RHOsolid
Kpsusp= Focsusp*Koc
The value of Ksusp-water of 0.979 is consistent with the calculated value with EUSES 2.1.1.
PNEC marine sediment using Equilibrium Partitioning Method:
Being marine PNEC usually derived by freshwater PNEC with an adding assessment factor of 10, consequently the marine sediment PNEC can be directly derived from PNEC sediment with an assessment factor of 10. Therefore PNEC marine sediments = 0.0408*0.1 = 0.00408 mg/kg.
Dry weight = 0.01021 * 4.6 = 0.046992
PNEC soil using Equilibrium Partitioning Method:
The following formula is applied:
PNECsoil= Ksoil-water *PNECwater*1000/RHOsoil
Where:
ECwater |
Predicted No Effect Concentration in water |
[mg.l-1] |
0.12 |
RHOsoil |
bulk density of soil |
[kg.m-3] |
1700 |
Ksoil water |
partition coefficient soil water |
[m3.m-3] |
0.295 |
PNECsoil |
Predicted No Effect Concentration in soil |
[mg.kg-1] |
0.02082 |
Dry weight = 0.02082*1.13 = 0.02353
Ksoil water= Fairsoil*Kair-waterl+Fwatersoil+ Fsolidsoil*Kpsoil/1000*RHOsolid
Kpsoil= Focsoil*Koc
Conclusion on classification
Based on the results of the eco-tox tests, Acid Yellow 23 does not needs to be classified for toxicity for the environment.
The different PNEC values were calculated:
PNEC freshwater: 0.12 mg/l
PNEC marine: 0.012 mg/l
PNEC STP: 10 mg/l
PNEC sed-freswater: 0.46992 mg/kg dryweight
PNEC sed- marine: 0.046992 mg/kg dry weight
PNEC soil: 0.02353 mg/kg dry weight
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