Registration Dossier
Registration Dossier
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EC number: 249-828-6 | CAS number: 29761-21-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.38 µg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.42 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.038 µg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- no data: aquatic toxicity unlikely
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.85 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.085 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:
- 0.251 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 0.74 mg/kg food
Additional information
The log Koc value of 5.05 used in the calculation of soil and sediment PNEC's was calculated in EUSES 2.1 using the "predominantly hydrophobics"-(Q)SAR and an input value of 6.11 for log Kow.
Conclusion on classification
The short-term LC50 or EC50 values are 0.15, 0.042 and >0.1 mg/l, for fish, aquatic invertebrates and algae, respectively. All these toxicity values are well above the water solubility (11.2 ug/l) of isodecyl diphenyl phosphate (IDDPP), indicating that acute toxicity is not expected at the limit of solubility.
Poorly water soluble substances which do not exert acute toxicity at their limit of solubility may require a precautionary classification of R53 ‘May cause long term adverse effects in the aquatic environment’ under the DSD and Chronic Category 4 under the CLP Regulations. However, this precautionary stance is not required for IDDPP as data are available to demonstrate that it is readily biodegradable.
IDDPP is therefore not classified in respect of the environment under either Directive 67/548/EEC or Regulation 1272/2008/EC .
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